半徑的用法和樣例：
例句
-
（曲軸的）半徑曲柄、凸輪或類似機器部件形成的圓的半徑
The radius of a circle described by a crank, cam, or similar machine part. -
住在離城中心半徑25英里的範圍內的家庭
Every family within a radius of25 miles of the city center. -
警察搜查了半徑兩英里範圍內所有的田野和森林。
The police searched all the fields and woods within a radius of two miles. -
我們能用半徑計算出圓的面積。
We can compute the circular area with radius.
