名词短语
中文翻译：机车试运行
同义词：
['locomotive test run', 'locomotive trial', 'locomotive trial run']
例句：
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1. The engineers conducted a locomotive trial run to ensure the safetyof the train.
工程师进行了一次机车试运行，以确保火车的安全。
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2. Before thebig event, they hada locomotive trialrun to check all the systems.
在大型活动之前，他们进行了一次机车试运行，以检查所有系统。
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3. Thelocomotive trial run was successful,and the engineers were pleased with theresults.
机车试运行成功，工程师对结果感到满意。