
好词典

源自拉丁语 'semicirculus',由 semi-(半)和 circulus(圆)组合而成,16世纪进入英语。
❶ 半圆,指一个圆被直径分割后形成的两部分之一,形状为180度的弧形加上直径的直线。
“The children sat in a semicircle around the teacher.”
(孩子们围着老师坐成半圆形。)
“The amphitheater was built in the shape of a semicircle.”
(这个圆形剧场被建造成半圆的形状。)
arrange in a semicircle — 将物品或人排列成半圆形,通常用于集体活动或展示场合。
“The students arranged their desks in a semicircle for the group discussion.”
(学生们把课桌排成半圆形以便进行小组讨论。)