名词
中文翻译：Unknown
同义词：
['change', 'variation', 'modification', 'difference']
例句：
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1. Thepopulation of the city has undergone significant variations in recent years.
这个城市的人口在过去几年里发生了显著的变化。
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2. The scientist conducted a series of modifications to the experiment design.
这位科学家对实验设计进行了一系列的修改。
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3.The differences between the two cultures are stark.
两种文化之间的差异非常明显。