过去的法律曾经规定公共场所必须将不同种族的顾客隔离开来。

Old laws once required public places to ___segregate customers by race.

20世纪中期，一些学校仍然按照种族将学生隔离。

In the mid-20th century, some schools still ___segregated students by race.

在细胞分裂过程中，染色体被正确分离以确保遗传稳定性。

During cell division, chromosomes ___segregate properly to maintain genetic stability.