名词
中文翻译：环形边缘
同义词：
['annular ring', 'annular circumference例句：1. The moon has a very thin annular rim around it.（月亮有一个非常薄的环状边缘。）']
例句：
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1. The moon has a very thin annular rim around it.
月亮有一个非常薄的环状边缘。
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2.The planet's surface is surrounded by an annular rim of mountains.
行星的表面被一圈山环绕着。
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3. The spacecraft's annular rim was designed to protect the crew from radiation.
宇宙飞船的环状边缘设计用来保护乘员免受辐射伤害。