goats是“山羊”，而sheep是那种“绵羊”，sheep and goats来自《圣经》，用来比喻“善人与恶人 ”，“好人与坏人”。

【例句】
Sheep and goats are the worst affected.
好人与坏人受的影响最大。

The way to encourage strong performance in public and private sectors alike is to motivate and appraise people properly, without creating sheep and goats.
在公共和私人部门鼓励优秀的方式，都是正确地激励和评估，不会人为地制造好人和坏人。