同义词： semicircle hemicycle
以上来源于: WordNet
N-COUNT 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。
The harbor looked most beautiful in its semi-circle hills and half-lights.
只见海港怀抱于半圆形小山丛中，煞是好看，朦朦胧胧， 一片银灰，宛若仙境。
The NBA installed a semi-circle in the lane preventing players from drawing charges directly under the hoop.
联盟已经在篮圈下方设置了一个半圆形的合理冲撞区，来避免队员被吹进攻犯规。
But when they were approaching the cross in the street, they stopped suddenly and gathered into a semi-circle.
将到丁字街口，便突然立住，簇成一个半圆。
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