名词
中文翻译：环形的
同义词：
['annular ring', 'annular gear', 'annular casing']
例句：
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1. The annular ring on the clock is a crucial part of its operation.
钟表上的环形圈是其运作的关键部分。
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2. The annular gears in the transmission system are designed to reduce friction and improve efficiency.
传动系统中的环形齿轮被设计来减少摩擦并提高效率。
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3. The annular casing protects the delicate electronic components inside from damage.
环形外壳保护内部敏感电子元件免受损害。