semicircle发音名词1半圆、半圆形The window above the door is a perfect semicircle.门上方的那扇窗是个完美的半圆形。2半圆形排列、弧形队形The children sat in a semicircle around the storyteller.孩子们围成半圆形坐在说故事的人身边。用这个字练口说→