圆的的用法和样例：
例句
-
半圆壁，弧形窗在高高的屋顶上的小的，圆的或新月形的开口
A small, circular or crescent-shaped opening in a vaulted roof. -
从前人们以为地球是平的，现在知道是圆的。
People used to think that the world was flat; now we know it is round. -
我们能用半径计算出圆的面积。
We can compute the circular area with radius. -
现在没有人会对地球是圆的这一事实提出异议。
Nowadays no one will challenge the fact that the earth is round.
