单词：mass selection
mass selection的用法和样例：
例句
- A bulk progeny test is a simple way to learn the effectiveness of mass selection.集团后代测验是了解混合选择有效性的一个简单方法。
- The genetic quality of the parents can be judged with much greater certainty than in mass selection.亲本的遗传品质比起混合选择来，能判断得更加确切。
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