名词
中文翻译：下降持续时间同义词
同义词：
['downtime', 'down-time', 'duration of downtime']
例句：
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1. The project is expected to take several months to complete.
这个项目预计需要几个月才能完成。
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2. During the down time, I was able to catch up on some reading.
在这段空闲时间里，我有时间阅读了。
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3. The team worked hard during the down time to ensure that everything was ready for launch.
团队在这段空闲时间里努力工作，确保一切准备就绪以启动项目。