时间: 2025-04-25 22:34:59
美: ['redɪəs]
英: ['reɪdɪəs]
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
最后更新时间:2025-04-25 22:34:59
词源分析:
历史背景:
课本:
正式与非正式语境:
正式:在数学、物理学、工程学等领域中,radius 是一个重要的术语,通常用于描述圆形、球体等的性质。
非正式:在日常交流中,可能用于描述某个范围或距离,例如“这家餐厅的服务半径很大”。
引证解释:
“The radius of the circle is essential for calculating its area.” (数学中)
特殊场合:
在科学领域中,radius 被用作描述原子、分子、天体等的大小。
在法律领域,radius 有时用于描述某个法律适用的地理范围。
引证解释:
“The legal radius of this jurisdiction extends to 50 miles.” (法律文献中)
The radius of the circle is 5 cm.
To calculate the area of a circle, use the formula A = πr², where r is the radius.
The radius of the Earth is about *,371 kilometers.
In this experiment, we will measure the radius of various spheres.
The service radius of the delivery company is limited to 30 miles.
*. The radius of the atom determines its reactivity.
The radius of the curvature in this lens affects the focus.
The radius of a circle is half of its diameter.
We need to increase the radius of our search area.
The radius of the circular track is 100 meters.
同义词:
反义词:
音标记忆法:
通过对以上内容的学*与分析,可以更深入地理解“radius”一词的含义与用法。
[N-SING] The radius around a particular point is the distance from it in any direction. 范围
例:Nick has searched for work in a ten-mile radius around his home.尼克已经在以家为中心10英里的范围内寻找工作。
[N-COUNT] The radius of a circle is the distance from its centre to its outside edge. 半径
例:He indicated a semicircle with a radius of about thirty miles.他标示出一个半径大约三十英里的半圆。