名词
中文翻译：Unknown
同义词：
['change', 'variation', 'modification', 'alteration']
例句：
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1. The population of the cityhas undergone significant variations in recent years.
这个城市的人口近年来发生了显著的变化。
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2. Thegenetic variation between different species is a fascinatingtopic in evolutionary biology.
不同物种之间的遗传变异是进化生物学中一个引人入胜的话题。
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3. The scientist observed several variations inthe plant's growth patterns during theexperiment.
科学家在实验中观察到了几种植物生长模式的变化。