动词短语
中文翻译：开始工作
同义词：
['on the job', 'on duty', 'in action']
例句：
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1. The engineer was on commission to fix the leaky roof.
工程师被指派来修理漏水的屋顶。
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2. The police were on commission to ensure public safety.
警察被指派来确保公共安全。
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3. The firefighters were on commission to extinguish the blaze.
消防员被指派来扑灭大火。