家系内选择的英文

• within-family selection

• 家系:    family
• 内:    inner; inside; within
• 选择:    pick and choose; select
• 家系内取样:    within-family sampling
• 局内选择机:    local selector

例句与用法

1. The data are not usually analyzed in such a way as to distinguish between interfamily and intrafamily section gains .
   数据往往不足以来分析区别家系间和家系内选择效益的方式。