名词
中文翻译：Unknown
同义词：
['annular', 'ring-shaped port', 'ring-shaped opening', 'ring-shaped channel']
例句：
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1. The annular port is used for connecting the two pipes together.
环形端口用于连接两根管道。
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2. The ring-shaped port is designed to prevent leaks and improve efficiency.
环形开口设计用来防止泄漏并提高效率。
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3. The ring-shaped channel is essential for carrying liquids and gases through the system.
环形通道对于输送液体和气体通过系统至关重要。