restrict
/rɪˈstrɪkt; rɪ`strɪkt/ v[Tn, Tn.pr]
~ sb/sth (to sth) put a limit on sb/sth 限制或约束某人[某事物]
Fog restricted visibility. 雾天能见度很低.
measures restricting one's freedom, authority, rights 限制自由、 权力、 权利的措施
Speed is restricted to 30 mph in towns. 市内车速每小时不得超过30英里.
families restricted to (having) one child 受限制只能有一个孩子的家庭
restrict oneself to one meal a day 限制自己一天吃一顿饭
You are restricted to eight litres of duty-free wine. 携带的免税酒不得超过八升.