例句:The Belgians took over Rwanda under a League of Nations mandate.
比利时人依照国际联盟的授权接管了卢旺达。

2.turn to 转变；变成

例句:There was no one to turn to, no one to tell.
没人可以求助，没人可以诉说。

3.bring to heel 使...就范；使...顺从

例句:That is a wonderful business to be in. It is also one we seem unable to bring to heel.
这是个绝妙的行当，也是一项我们似乎无法迫使它就范的业务。

4.left off 中断；停止

例句:Some of the patients left off treatment.
有些病人停止了治疗。