单词详解

n.

[C] 半圆，半圆弧，半圆形 ( a plane figure with the shape of half a circle)

Please sit in a semicircle and I will tell you a story.

围成半圆坐，我来给大家讲故事。

An angle in a semicircle is a right angle. 半圆所对的圆周角是直角。

The children sat in a semicircle round the fire.

孩子们坐在炉火前，围成一个半圆形。

We sat in a semicircle facing the teacher. 我们面对着老师坐成半圆形。

The teacher drew a semicircle on the blackboard. 老师在黑板上画了半个圆。

相关词组

turn in a semicircle 转半圈

What time is will be if the shortest hand turns in a semicircle? 如果时针转半圈将会是几点？

相关单词

同义词：hemicycle