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subtend如何读

英：[səbˈtend]

美：[səb'tend]

subtend是什么意思

vt.[数]对着；对向；[植]包在叶腋内

subtend自然拼读

sub·tend

sb tend

subtend变形

第三人称单数:subtends

现在分词:subtending

过去式:subtended

过去分词:subtended

subtend英英释义

verb

transitive verb

to be opposite to and extend from one side to the other of

a hypotenuse subtends a right angle

to fix the angular extent of with respect to a fixed point or object taken as the vertex the angle subtended at the eye by an object of given width and a fixed distance away

a central angle subtended by an arc

to determine the measure of by marking off the endpoints of

a chord subtends an arc

to underlie so as to include

to occupy an adjacent and usually lower position to and often so as to embrace or enclose

a bract that subtends a flower

subtend词源中文解释

1560年代，源自拉丁语 subtendere “在下方拉伸”，由 sub “在下方”（见 sub-)和 tendere “拉伸”组成，源自 PIE 词根 *ten- “拉伸”。相关词汇： Subtended； subtending。

subtend词源英文解释

Latin subtendere to stretch beneath, from sub- + tendere to stretch — more at thin

The first known use of subtend was circa 1560

subtend 例句

1 And while despoiling these smaller muscles which subtend gentle and delicate artistries, the crude larger ones, hypertrophied by athletic activities, become alike a burden and a curse to their possessor.

2 A line through the center of a circle perpendicular to a chord bisects the chord and the arcs subtended by it.

3 Using these apparent or "subtended" values, instead of actual ones, the researchers discovered a particular ratio between size and speed that usually triggers a pounce.

4 In Setaria and allied genera the spikelet is subtended by an involucre of bristles or spines which represent sterile branches of the inflorescence.

5 The motions they subtend are concerned with vital functions; nutrition, respiration, circulation, assimilation, elimination, reproduction.

6 The line with letters that subtend 5 minutes of an arc from 20 feet represents the smallest letters that a person with normal acuity should be able to read at that distance.

7 Emerging from a half-moon-shaped spathe, two bright blue petals are subtended by a nearly transparent, milky white smaller petal.

8 These fringes form a series of equidistant interference bands, and are most distinct when the light comes from a source subtending an infinitesimal angle.

9 In equal circles equal arcs are subtended by equal straight lines.

10 Find the length of the arc of a circle of radius 10 centimeters subtended by the central angle of 50°.

11 Find the length of the arc of a circle of diameter 12 meters subtended by the central angle is 63°.

12 Because all stars are so far away, the light that reaches Earth from each of them and falls on your retina subtends an area smaller than that of a single photoreceptor.

13 TRY IT #8 Find the arc length along a circle of radius 10 units subtended by an angle of 215°.

14 Euclid stated the proposition thus, "If in a triangle two angles be equal to one another, the sides which subtend the equal angles will also be equal to one another."

15 "One way of solving this problem is to match up the size with the speed. So a plane may have the right subtended size, but it won't come across the retina at the right speed."

16 We have already shown how the angular diameters subtended by many of the stars have been estimated, through the relation of surface brightness and spectral type.

17 He did not define "subtend," supposing such words to be already understood.

18 The critical central retina subtends an area of visual space of about 1 square degree of visual angle.

19 Find the length of the arc of a circle of radius 12 inches subtended by a central angle of radians.

20 It’s still one earth, but it is now subtended by a layer of highly elastic non-time, wild time, that is akin to a global collective unconscious wherein past, present, and future occupy one unmediated plane.