（1）组间变异：各处理组均数之间不尽相同，这种变异叫做组间变异（variation among groups），组间变异反映了处理因素的作用（处理确有作用时 ），也包括了随机误差（ 包括个体差异及测定误差 ）, 其大小可用组间均方（MS组...
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The variation among individuals is much greater than the differences among groups.
个体之间的差异远远大于群体之间的差异。
The variation among individuals is much greater than the differences among groups.
个体之间的差异大于群体之间的差异。
Studies demonstrated that there is a wide variation of genetic polymorphisms of genes, which could be genetic factor of different susceptibility to diseases among different ethnic groups.
研究表明，不同种族之间遗传基因序列存在差异，可能是疾病易感性不同的遗传基础。
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