圓的的用法和樣例：
例句
-
半圓壁，弧形窗在高高的屋頂上的小的，圓的或新月形的開口
A small, circular or crescent-shaped opening in a vaulted roof. -
從前人們以為地球是平的，現在知道是圓的。
People used to think that the world was flat; now we know it is round. -
我們能用半徑計算出圓的面積。
We can compute the circular area with radius. -
現在沒有人會對地球是圓的這一事實提出異議。
Nowadays no one will challenge the fact that the earth is round.
