separate out (someone or something) or separate (someone or something) out
: to remove (someone or something) from a group分拣；挪开；移开 -
Before you put out the trash, you have to separate out the bottles and cans.在扔垃圾之前，须将瓶子和罐头盒分拣出来。
-
Most schools separate out children with learning problems.大多数学校都把学习有问题的孩子分出来。