semicircle
/ˈsem.iˌsɜː.kəl/
half a circle
n. 半圆形,半圆形的周长,半圆形的东西
We arranged the chairs in a semicircle.
我们把椅子摆成半圆形。
We sat in a semicircle facing the teacher.
我们面对着老师坐成半圆形。
semicircular
/sem.iˈsɜː.kjə.lər/
shaped liked a half circle
adj. 半圆的
The chairs were placed in a semicircular arrangement.
椅子被摆成了半圆形。
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