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focus    音标拼音: [f'okəs] [f'okɪs]
n. 焦点,焦距
vi. 聚焦,注视
vt. 使聚焦,调焦,集中
n. 焦点

焦点,焦距聚焦,注视使聚焦,调焦,集中焦点

focus
焦点


FOCUS
焦点

focus
焦点

focus
n 1: the concentration of attention or energy on something; "the
focus of activity shifted to molecular biology"; "he had no
direction in his life" [synonym: {focus}, {focusing},
{focussing}, {focal point}, {direction}, {centering}]
2: maximum clarity or distinctness of an image rendered by an
optical system; "in focus"; "out of focus"
3: maximum clarity or distinctness of an idea; "the controversy
brought clearly into focus an important difference of
opinion"
4: a central point or locus of an infection in an organism; "the
focus of infection" [synonym: {focus}, {focal point}, {nidus}]
5: special emphasis attached to something; "the stress was more
on accuracy than on speed" [synonym: {stress}, {focus}]
6: a point of convergence of light (or other radiation) or a
point from which it diverges [synonym: {focus}, {focal point}]
7: a fixed reference point on the concave side of a conic
section
v 1: direct one's attention on something; "Please focus on your
studies and not on your hobbies" [synonym: {concentrate},
{focus}, {center}, {centre}, {pore}, {rivet}]
2: cause to converge on or toward a central point; "Focus the
light on this image" [ant: {blur}]
3: bring into focus or alignment; to converge or cause to
converge; of ideas or emotions [synonym: {concenter},
{concentre}, {focalize}, {focalise}, {focus}]
4: become focussed or come into focus; "The light focused" [synonym:
{focus}, {focalize}, {focalise}] [ant: {blur}, {dim}, {slur}]
5: put (an image) into focus; "Please focus the image; we cannot
enjoy the movie" [synonym: {focus}, {focalize}, {focalise},
{sharpen}] [ant: {blear}, {blur}]

Focus \Fo"cus\, v. t. [imp. & p. p. {Focused}; p. pr. & vb. n.
{Focusing}.]
To bring to a focus; to focalize; as, to focus a camera. --R.
Hunt.
[1913 Webster]


Focus \Fo"cus\ (f[=o]"k[u^]s), n.; pl. E. {Focuses}
(f[=o]"k[u^]s*[e^]z), L. {Foci} (f[=o]"s[imac]). [L. focus
hearth, fireplace; perh. akin to E. bake. Cf. {Curfew},
{Fuel}, {Fusil} the firearm.]
1. (Opt.) A point in which the rays of light meet, after
being reflected or refracted, and at which the image is
formed; as, the focus of a lens or mirror.
[1913 Webster]

2. (Geom.) A point so related to a conic section and certain
straight line called the directrix that the ratio of the
distance between any point of the curve and the focus to
the distance of the same point from the directrix is
constant.
[1913 Webster]

Note: Thus, in the ellipse FGHKLM, A is the focus and CD the
directrix, when the ratios FA:FE, GA:GD, MA:MC, etc.,
are all equal. So in the hyperbola, A is the focus and
CD the directrix when the ratio HA:HK is constant for
all points of the curve; and in the parabola, A is the
focus and CD the directrix when the ratio BA:BC is
constant. In the ellipse this ratio is less than unity,
in the parabola equal to unity, and in the hyperbola
greater than unity. The ellipse and hyperbola have each
two foci, and two corresponding directrixes, and the
parabola has one focus and one directrix. In the
ellipse the sum of the two lines from any point of the
curve to the two foci is constant; that is: AG GB =
AH HB; and in the hyperbola the difference of the
corresponding lines is constant. The diameter which
passes through the foci of the ellipse is the major
axis. The diameter which being produced passes through
the foci of the hyperbola is the transverse axis. The
middle point of the major or the transverse axis is the
center of the curve. Certain other curves, as the
lemniscate and the Cartesian ovals, have points called
foci, possessing properties similar to those of the
foci of conic sections. In an ellipse, rays of light
coming from one focus, and reflected from the curve,
proceed in lines directed toward the other; in an
hyperbola, in lines directed from the other; in a
parabola, rays from the focus, after reflection at the
curve, proceed in lines parallel to the axis. Thus rays
from A in the ellipse are reflected to B; rays from A
in the hyperbola are reflected toward L and M away from
B.
[1913 Webster]

3. A central point; a point of concentration.
[1913 Webster]

{Aplanatic focus}. (Opt.) See under {Aplanatic}.

{Conjugate focus} (Opt.), the focus for rays which have a
sensible divergence, as from a near object; -- so called
because the positions of the object and its image are
interchangeable.

{Focus tube} (Phys.), a vacuum tube for R[oe]ntgen rays in
which the cathode rays are focused upon the anticathode,
for intensifying the effect.

{Principal focus}, or {Solar focus} (Opt.), the focus for
parallel rays.
[1913 Webster]

96 Moby Thesaurus words for "focus":
adductor, approach, asymptote, attractant, attrahent, axiom,
blurred, blurry, bottleneck, bring into focus, center,
center of attraction, center of consciousness, center of interest,
clear, collision course, concenter, concentralization,
concentralize, concentrate, concentration, concourse, concurrence,
confluence, conflux, congress, converge, convergence, converging,
core, crossing, cynosure, distinct, elixir, essence, essential,
fix, fixate, flower, focal point, focalization, focalize,
focus of attention, fundamental, funnel, fuzzy, gist, gravamen,
heart, hub, hypostasis, in focus, indistinct, inner essence,
kernel, lodestar, lure, magnet, marrow, meat, meet, meeting,
mutual approach, narrowing gap, nave, nerve, nub, nucleus,
nuts and bolts, out of focus, pinpoint, pith, point of convergence,
polestar, postulate, prime focus, principle, put, quid, quiddity,
quintessence, radius, rivet, sap, soul, spirit, spokes, spotlight,
stuff, substance, tangent, target, the nitty-gritty, unclear,
woolly, zero in


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  • Focus Cheats : r hoi4 - Reddit
    focus ignoreprerequisites lets you ignore the focus tree to skip focuses without triggering them and proceed to initiate the later focuses So none of them actually lets you initiate disabled focuses due to choosing an alternative, unlike how research_on_icon_click will let you "research" disabled researches on click
  • How can i setup a focus targeting macro and how do they work
    Clears focus if you hit shift, your focus is dead, your focus is friendly, or your focus doesn’t exist (this last one might be redundant, now that I’m looking) focus [target=focus,noexists] Sets a new focus Your target becomes your focus if your focus is empty Otherwise your focus is unchanged cast [target=focus]Mind Freeze
  • Focus Macros : r CompetitiveWoW - Reddit
    For focus interrupts I use 2 of my 6 buttons on my mouse One is a simple focus macro, and the other is a focus interrupt macro When I'm running into a pack I just set my focus on whatever the dangerous caster is or whatever I'm assigned to
  • Are there console command you can use to create, join and . . . - Reddit
    eval_effect TAG = { create_faction = "faction name" } eval_effect TAG = { dismantle_faction = yes } eval_effect TAG = { add_to_faction = TAG }
  • Questions about Duke Focus! : r duke - Reddit
    Focus is not an advantage, but just another way to make friends From personal experience, I am now only close friends with one person from my focus cluster Since focus class size is small, it's not difficult to interact with professors But duke offers a ton of small-sized classes even for freshmen So I don't think focus creates 'better' bonds
  • My experience with BCBS Fep Blue Focus health : r fednews - Reddit
    I had outpatient orthopedic surgery, did involve anesthesia From what I can conclude, the out of pocket cost of Focus was about $1200 more than what basic would be for the surgery I hadn't used up my deductible by the time surgery came around but considering how much I saved on premiums throughout the year, I am still way ahead with Focus
  • National focus cheat : r hoi4 - Reddit
    Focus NoChecks i think Maybe combine with Focus AutoComplete to get it done the instant you select it, so you can turn it all off again before unpausing Reply reply
  • How to get your brain to focus, no bullshit guide. Im tired . . . - Reddit
    The feeling of being productive, working with deep focus and getting stuff done feels amazing So when it’s hard to focus and you keep getting distracted, enjoy that struggle and just keep bringing your focus back Find work that feels like play You can get your brain to focus much easier when you like what you are doing
  • Understanding Focus : r Palia - Reddit
    It doesn't matter how much of your Focus bar is filled (full, half, or almost empty), as long as you have Focus to be spent Here's a quote from the Wiki: "When you earn Experience, some of your Focus is used to increase the total amount of Experience received The amount of Focus spent is based on your current Focus Bonus
  • focus: because oh look a bird! - Reddit
    Welcome to r focus, where we talk about techniques for improving your focus Anything is welcome, including productivity tips, meditation techniques, and other relevant suggestions or content Discuss your progress, problems, and concerns We'll try our best to help!





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