名词
中文翻译：偶然的变化
同义词：
['accidental variation', 'serendipitous variation']
例句：
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1. The scientist observed a fortuitous variation in the population distribution.
科学家观察到了人口分布的偶然变异。
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2. The geneticists were surprised by the serendipitous variation in the gene sequence.
遗传学家对基因序列中的偶然变异感到惊讶。
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3. The discovery of this fortuitous variation has led to significant advancements in medicine.
这一偶然变异的发现在医学上取得了显著的进步。