名词
中文翻译：Unknown
同义词：
['pore', 'hole', 'aperture', 'opening']
例句：
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1. The sponge has many pores that allow water to pass through easily.
海绵有很多孔，水可以很容易地通过。
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2. The valve on the pipe is a small hole that allows air to flow through.
水管上的阀门是一个小孔，允许空气流动。
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3. The coral has many holes that help it filter out food and debris.
珊瑚有许多孔，帮助它过滤掉食物和杂质。