名词
中文翻译：持续时间
同义词：
['period', 'span', 'interval']
例句：
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1.The project will take a duration of six months.
这个项目将持续六个月。
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2. The journey lasted for three hours, which is a reasonable duration.
这次旅行持续了三个小时，这是合理的时长。
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3.The company's performance has been under scrutiny for the past year, and it's fair to say that the duration is too long.
这家公司过去一年的表现一直受到审查，可以说这段时间太长了。