半径英文，radius是什么意思，含义，中文翻译，radius怎么读，音标
- n. 半径，半径范围；[解剖] 桡骨；辐射光线；有效航程
- n. (Radius)人名；(意、印尼)拉迪乌斯；(英)雷迪厄斯；(法)拉迪于斯
radius是什么意思
n. 半径, 范围, 辐射光线
[电] 半径
n. the length of a line segment between the center and circumference of a circle or sphere
n. a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
n. a circular region whose area is indicated by the length of its radius
n. the outer and slightly shorter of the two bones of the human forearm
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中文词源
rad-,半径，根，-us,**格。
英文词源
- radius (n.)
- 1590s, "cross-shaft," from Latin radius "staff, stake, rod; spoke of a wheel; ray of light, beam of light; radius of a circle," of unknown origin. Perhaps related to radix "root," but Tucker suggests connection to Sanskrit vardhate "rises, makes grow," via root *neredh- "rise, out, extend forth;" or else Greek ardis "sharp point."
The geometric sense first recorded 1610s. Plural is radii. Meaning "circular area of defined distance around some place" is attested from 1953. Meaning "shorter bone of the forearm" is from 1610s in English (the Latin word had been used thus by the Romans).
radius的用法和例句：
1. It means we're talking about a blast radius, a halfamile blast radius.
这指的是爆炸半径 800米爆炸半径
2. The deceased presents with breaks to the radius, distal ulnar and a fracture to the distal radius of the left hand.
死者的桡骨和尺骨远端骨折 左手桡骨远端也有一处骨折
3. We have it triangulated to a oneblock radius.
我们把地址三角**在了一个街区半径内
4. That's a spiral fracture on her radius.
那是她桡骨上的螺旋形骨折
5. We've narrowed it down to a tenblock radius.
我们只能把范围控制在10个街区以内
6. American sanctions don't have a blast radius.
美国人的制裁可没设置爆炸范围
7. There are falsestart kerf marks on this radius.
在这根桡骨上有第一次留下的锯痕
8. That ship could be docked in a 25mile radius.
25英里半径内 那艘船可能停靠在任何地方
9. Our units are covering a 100mile radius.
我们的部队 遍布方圆161公里的范围
10. Harrison could be anywhere in this fivemile radius.
哈里森可能在半径八公里内的任何地方
经典诗词赏析
《卧疾》
唐代 · 张籍
身病多思虑，亦读神农经。空堂留灯烛，四壁青荧荧。
羁旅随人欢，贫贱还自轻。今来问良医，乃知病所生。
僮仆各忧愁，杵臼无停声。见我形憔悴，劝药语丁宁。
春雨枕席冷，窗前新禽鸣。开门起无力，遥爱鸡犬行。
服药察耳目，渐如醉者醒。顾非达性命，犹为忧患生。
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