名词
中文翻译：操作时间
同义词：
['操作持续时间，运行时间例句：1. The machine has a long cluth operating time', 'which makes it difficult to maintain.（这台机器的操作时间长，维护起来很困难。）']
例句：
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1. The machine has a long cluth operating time, which makes it difficult to maintain.
这台机器的操作时间长，维护起来很困难。
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2. The engineer had to wait for the cluth operating time to finish before he could start working again.
工程师在操作时间结束后才能再次开始工作。
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3.The company's cluth operating time is one of its key competitive advantages.
公司的操作时间是其核心竞争力之一。