请坐成半圆。快集合，请坐下。

Please sit in a semi-circle .

舞台被设计成半圆形状。

The stage was designed in the shape of a semicircle.

月亮看起来像一个半圆。

The moon looks like a semicircle.

用圆规在纸上画一个半圆。

Draw a semicircle on the paper using a compass.

我们在纸上画了一个半圆。

We drew a semicircle on the paper.

他们围成一个半圆讨论问题。

They formed a semicircle to discuss the issue.

孩子们坐成一个半圆听故事。

The children sat in a semicircle to listen to the story.

孩子们围着老师坐成一个半圆。

The children sat in a semicircle around the teacher.

罗马式建筑以其半圆形拱门而闻名。

The Romanesque architecture is known for its semi-circular arches.

彩虹在天空中形成了一个完美的半圆。

The rainbow formed a perfect semicircle in the sky.