这座城市在20世纪60年代仍然实行公交车种族隔离制度。

This city still had ___segregated buses in the 1960s.

学校将男女学生分开在不同的宿舍楼。

The school has ___segregated dormitories for male and female students.

学校将男生和女生分开在不同的楼层。

The school has ___segregated boys and girls on different floors.