名词
中文翻译：Unknown
同义词：
['inflate', 'expand', 'enlarge']
例句：
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1.The balloon dedoubled when it was released into the air.
当气球被释放到空中时，它膨胀了。
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2. The tree is expanding, and it will be bigger next year.
这棵树正在扩张，明年它会更大。
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3.The company is planning to expand its operations in Europe.
该公司计划在欧洲扩大其业务。