动词短语
中文翻译：开始运行
同义词：
['in operation', 'in progress', 'in service']
例句：
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1. The new hospital is in operation now.
新医院现在正在运营。
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2. The project is in operation and we need to monitor its progress.
项目正在运行，我们需要监控其进展。
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3.The machine is in operation and the operator needs to check the temperature regularly.
机器正在运行，操作员需要定期检查温度。