动词
中文翻译：延长
同义词：
['extend', 'extend', 'protract例句：1. The rain has been prolonging the construction work.（雨一直拖延着施工工作。）2. We need to prolong our vacation by taking a trip.（我们需要通过旅行来延长我们的假期。）']
例句：
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1. The rain has been prolonging the construction work.
雨一直拖延着施工工作。
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2. We need to prolong our vacation by taking a trip.
我们需要通过旅行来延长我们的假期。
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3. The project will be protracted due to the unforeseen difficulties.
由于未预见到的困难，这个项目将延期。