名词短语
中文翻译：河流床保护
同义词：
['riverbed protection', 'riverbed preservation']
例句：
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1. The governmenthas implemented a new policy to protect the stream bed.
政府已经实施了一项新的政策来保护河流床。
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2. The conservationists are working on a project to preserve the stream bed habitats.
保护主义者正在致力于一个项目，以保护河流床的栖息地。
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3. The local government has declared a state of emergency due to the damage to the stream bed caused by the flood.
当地政府已宣布因洪水对河流床造成的损害而进入紧急状态。