vt.
(使)改变；变换；改革；更改：
Flyovers have changed the face of the city.
立交桥改变了城市的面貌。
更换；替换：
She changed her clothes rapidly.
她迅速地更换了衣服。
交换；调换：
He went back to the shop and changed that shirt for a larger one.
他返回商店把那件衬衣调换成一件大一些的。
He changes letters with a foreign