change 
英 [tʃeɪndʒ]  美 [tʃeɪndʒ] 
n. 变化；交换，交替；零钱

v. 改变；交换，替换；兑换；更换

例句：
This changed the direction of U.S. foreign policy. 

这改变了美国外交政策的方向。

They should change the law to make it illegal to own replica weapons. 

他们应该修改法律，使拥有仿制武器不再合法。

Trees are changing colour earlier than last year. 

树木变颜色比去年提早了。

It was his doctor who advised him to change his job. 

是医生建议他换工作的。

If you want to change your doctor there are two ways of doing it. 

如果你想换医生，有两种做法。