动词短语
中文翻译：顶部切片和塌陷
同义词：
['顶部切割，顶部坍塌例句：1. The engineer was top slicing the roof to fix it.（工程师正在顶部切割屋顶以修复它。）']
例句：
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1. The engineer was top slicing the roof to fix it.
工程师正在顶部切割屋顶以修复它。
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2. They were top slicing and caving in the mountain.
他们在山上进行顶部切割和塌陷。
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3. The construction crew was top slicing and caving the foundation.
建筑工人正在进行顶部切割和地基塌陷工作。