动词短语
中文翻译：使变长
同义词：
['extend', 'stretch', 'lengthen']
例句：
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1. The rope was lengthened bypulling it taut.
通过拉紧绳子，绳子变长了。
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2. The bridgeis lengthened to accommodatemore traffic.
为了容纳更多的交通，桥梁被延长了。
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3. The marathonrunners are lengthening their stridesto catch up with the other competitors.
马拉松跑者正在加快步伐，以赶上其他竞争者。