名词
中文翻译：火山口
同义词：
['pit', 'crater', 'pitfall', 'hollow']
例句：
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1.The volcano erupted, and a large crater was formed on the mountainside.
火山爆发了，山顶形成了一个大坑。
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2. The crater is filled with water, which has been collected from the surrounding area.
这个坑里装满了水，是从周围地区收集来的。
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3. The crater is a popular tourist attraction, attracting many visitors each year.
这个坑是一处受欢迎的旅游景点，每年吸引许多游客。