名词
中文翻译：Unknown
同义词：
['variation', 'mutation', 'mutation', 'variation']
例句：
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1.The population of the city has undergonesignificant changes in recent years.
这个城市的人口在近年来发生了显著的变化。
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2. Scientists are studying the geneticmutations that cause cancer.
科学家们正在研究导致癌症的遗传突变。
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3. The newdrug has shown promising results in treating variousforms of cancer.
这种新药在治疗各种癌症方面显示出了令人鼓舞的结果。