名词
中文翻译：防水井
同义词：
['waterproof well', 'rainwater well']
例句：
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1. Thesump well is designed to collect rainwater and prevent flooding during heavy rainfall.
这个防水井设计用来收集雨水，防止大雨时发生洪水。
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2. The sump wellwas installed in the basement to provide asafe place for emergency water backup.
地下室安装的防水井是为了提供一个紧急情况下的安全水备份场所。
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3. The sump well wasfilled with sand to prevent the basement frombecoming flooded during heavy rains.
防水井被填充了沙子，以防止在大雨期间地下室被淹没。