单词有:restrict、restrain、obligation其中restrict, restrain这两个词都有“限制,约束,管制”的意思。restrain的语气比较温和,有时指自我约束; restrict是指限制在一个界限或范围内而obligation(合同、契约的)约束力词组有:hold in压住; 忍耐; 抑制limit to对…的限制;限制…在…之内keep a rein on约束,用作及物动词
The number of the students is restricted from 5 to 10.restrict[英] [risˈtrikt] [美] [rɪˈstrɪkt] vt. 限制,限定;约束,束缚;the number of[英] [ðə ˈnʌmbə ɔv] [美] [ði ˈnʌmbɚ ʌv] ……的数目;