“separate the sheep from the goats”可不是“区分绵羊和山羊”，引申为分辨好人与坏人；区别好坏；分清良莠；把好人同坏人分开；区分善恶。

【例句】
This test should separate the sheep from the goats.
这次测试会鉴别出好坏来的。

Ms. anderson always separate the sheep from the goatsin her classes. she puts naughty boys in front so as to keep an eye on them.
安德森女士总是将班上的学生分开，让调皮的男生坐在前面好看管他们。