动词
中文翻译：膨胀
同义词：
['bulge', 'expand', 'inflate', 'swell']
例句：
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1. The balloon has swelledup to twice its original size.
这个气球已经膨胀到原来的两倍大小。
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2. Theocean is expanding due to global warming.
由于全球变暖，海洋正在扩张。
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3. Thetires are expanding as the car accelerates.
随着汽车加速，轮胎正在扩张。