Word · Frequency #7090
radii
半径
radii is the plural of radius.
核心释义
a line segment from the center to the circumference of a circle or sphere
- 1.
前臂中靠近拇指的一根长骨
The long bone in the forearm, on the side of the thumb.
- 2.
圆或球体中心到圆周的线段长度
the length of a line segment between the center and circumference of a circle or sphere
- 3.
动物前肢中较轻的骨头(或骨头的融合部分)
The lighter bone (or fused portion of bone) in the forelimb of an animal.
- 4.
从圆心到圆周的直线(或从球心到球面的直线)
a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
- 5.
昆虫翅膀上的主要脉之一,位于亚肋和中脉之间；沿着盘细胞的肋缘运行的脉
One of the major veins of the insect wing, between the subcosta and the media; the vein running along the costal edge of the discal cell.
- 6.
由其半径长度表示面积的圆形区域
a circular region whose area is indicated by the length of its radius
- 7.
圆或球体上任意一点与其中心之间的线段
A line segment between any point of a circle or sphere and its center.
- 8.
该线段的长度
The length of this line segment.
- 9.
类似半径的东西,如车轮的辐条、六分仪的活动臂或蜘蛛网的辐射线
Anything resembling a radius, such as the spoke of a wheel, the movable arm of a sextant, or one of the radiating lines of a spider's web.
- 10.
给定图中任何顶点的最小偏心率
The minimum eccentricity of any vertex, for a given graph.
前臂中靠近拇指的一根长骨；圆或球体中心到圆周的线段长度；动物前肢中较轻的骨头(或骨头的融合部分)；从圆心到圆周的直线(或从球心到球面的直线)；昆虫翅膀上的主要脉之一,位于亚肋和中脉之间；沿着盘细胞的肋缘运行的脉
用法In use
The radius of the circle is 5 centimeters.
用法提示：名词，表示圆的半径。
We need to measure the radius of the circular table to buy a proper tablecloth.
用法提示：名词，表示圆形物体的半径。
The explosion had a radius of several kilometers.
用法提示：名词，表示爆炸的影响范围或半径。
they located it within a radius of 2 miles
the radius of [noun]
后接表示圆形或球体的名词。
Calculate the radius of the circle.
计算圆的半径。
within a radius of [number] [unit]
表示范围，常与公里、英里等单位连用。
相关词与表达Connections
搭配Collocations
- radius of a circle
- 圆的半径
- The radius of a circle is half its diameter.圆的半径是其直径的一半。
- within a radius of
- 在...半径范围内
- All houses within a radius of 5 km were evacuated.所有在5公里半径范围内的房屋都被疏散了。
- radius bone
- 桡骨
- The radius bone is located on the thumb side of the forearm.桡骨位于前臂的拇指一侧。
- radius of curvature
- 曲率半径
- The radius of curvature of the lens determines its focusing power.透镜的曲率半径决定了其聚焦能力。
- orbital radius
学习提示Learner notes
记忆技巧Memory Tip
想象从圆心发出的辐射线（radio），半径就是那条线。
语境与语域Context & Register
几何学、工程学、天文学等正式语境。通常为中性正式用语。
语法说明Grammar Note
常与 of 连用表示某物的半径
发音与拼写Pronunciation & Spelling
None of the listed words rhyme with 'radius'. Words like 'serious' and 'previous' end in '-ious' but differ in stressed vowel and ending sounds. Words ending in '-us' (campus, virus, focus) also have different vowel sounds.
用法优先级Usage priority
Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
一起学习词形Learn the forms together
Dictionary facts from ECDICT, WIKTIONARY.