名词
中文翻译：化学关闭
同义词：
['chemical shutdown', 'chemical lockout', 'chemical lock-down']
例句：
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1. The plant was shut down due to safety concerns.
由于安全担忧，该工厂被关闭了。
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2. The workers were locked out from the factory until further notice.
工人们被暂时禁止进入工厂，直到另行通知。
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3. The government has ordered a chemical lock-down in the affected area.
政府已下令在该受影响地区实施化学封锁。