right semi-circle右半圆
semi-circle end半圆头
Semi-Circle Effect半圆效应
semi-circle E半圆的
semi-circle arch半圆拱
Semi-circle structures动物骨骼围圈
semi-circle heated半周向加热
semi-circle theorem半圆定理
semi-circle breakwater半圆型防波堤
N-COUNT（可数名词） A semicircle is one half of a circle, or something having the shape of half a circle. 半圆 (形)
They sit cross-legged in a semicircle and share stories.
他们盘着腿围成半圆坐在一起讲故事。