名词
中文翻译：伸长
同义词：
['extension', 'elongate', 'extension']
例句：
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1.The tree's branches are extending towards the sky.
树枝正在向天空伸展。
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2. The car is elongating as it accelerates.
汽车加速时在延长。
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3. The river has been elongating over the years due to erosion.
由于侵蚀，河流多年来一直在延长。