只能在射门区内攻进的球才能得分。射门区是对方球门前的一个大致呈半圆形的区域。
It can only be taken from the shooting circle, a roughly semi-circular area in front of the opponents' goal.
柱子后面是掘好的一个大坑，边沿有新垒起的泥土，土坑和柱子附近，呈半圆形站着一大群人。
A big pit had been dug out near the post, and the freshly turned-up earth was heaped up by it. A great crowd of people formed a semicircle about the pit and the post.
古希腊剧场起源很早，基本造型是利用山坡地势，观众席逐排升高，呈半圆形，并有放射形的通道。
Ancient Greek theater origin early, basic model is using hillside topography, the audience is increased by row, and have a semicircle, distribution channel.
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