名词
中文翻译：重大变化
同义词：
['major change', 'significant change', 'radical change']
例句：
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1. The company has undergonea major change in its management team.
该公司的管理团队发生了重大变化。
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2. Theweather has undergone asignificant change since yesterday.
自昨天以来，天气发生了显著变化。
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3. Theeconomy is undergoing a radical change asa result of the new policy.
由于新的政策，经济正在经历一次根本性的变化。