名词
中文翻译：环形的
同义词：
['annular', 'circumferential', 'ring-shaped']
例句：
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1. The annular ring of the satellite is visible from space.
卫星的环形圈在太空中可见。
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2. The annular rings are used to support the structure.
环形圈用于支撑结构。
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3. The annular gap between the two plates is filled with a lubricant.
两块板之间的环形间隙被润滑油填充。