Yet china made the system obligatory only in 1995 .
但中国直到1995年才强制采取这一做法。
The system of obligatory residence permits was introduced in the 1950s to control internal migration .
强制性的户籍制度是在上世纪50年代开始实行的，目的是控制国内人口流动。
But individually , we see the opportunity to mold the institution to fit our own values-even more now that it 's not obligatory .
但个人看来，我们有机会改进这种制度让其符合我们的价值观更多是因为婚姻不是强制的。
Some muslim britons contract an islamic marriage ( but not acivil one ) and then fail to confer on the bride the marriage settlement that would be obligatory in say , pakistan .
