isolate : 侧重指完全分离、隔开，也指人或处于完全孤立的状态。
A high wall isolated the house from the rest of the village.
一堵高墙将这栋房子与村庄的其他部分隔离开来。
They tried to isolate (= find) the cause of the problem.
他们试图找出问题的原因。
segregate : 指把一群人或物从整体或主体中分离出来并区别对待，尤指基于种族或性别原因
a segregated school/society
实行种族隔离的学校／社会
Blacks were segregated from whites in every area of life.
在生活中的各方各面，黑人同白人被隔离开。
