名词
中文翻译：机器小时
同义词：
['machine time', 'machine hour', 'machine work hour']
例句：
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1. The engineers were busy calculating the machine hours required for the project.
工程师们忙于计算项目所需的机器工时。
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2. The factory had to shut down for a few hours due to machine hours exceeding the limit.
由于机器工时超过了限制，工厂不得不关闭几个小时。
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3. The machine hours worked out to be 48 hours, which is more than enough time for us to completethe task.
机器工时计算出来是48小时，对我们来说足够完成这项任务了。