名词
中文翻译：扩张
同义词：
['expansion', 'expansion例句：1. The heart rate increased during the dilation of the blood vessels.（在血管扩张期间，心率增加。）']
例句：
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1. The heart rate increased during the dilation of the blood vessels.
在血管扩张期间，心率增加。
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2.The company's profits have been expanding rapidly.
公司的盈利正在迅速增长。
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3. During the dilation of the arteries, the blood flow increases.
在动脉扩张时，血流增加。