撤换的英文：
recall
dismiss and replace

参考例句：

He is inefficient and must be replaced.
他不称职,必须撤换.

We needed to watch carefully when the thai leaders associated with us would be replaced
当与我们有交往的泰国领导人被撤换时，我们就要密切注意。

recall是什么意思：
v. 回忆起；召回；收回；撤销；取消；使复苏，使恢复
n. 唤回；回想，回忆；记忆力；收回；撤销；取消

She recalled her promise.
她取消了约言。

The dead can not be recalled to life.
死者不能复活。

Recall your messenger.
召回你的使者。

dismiss是什么意思：
v. 解雇；让...离开；不再考虑；抛弃；解散；遣散

notice of dismissal
驳回上诉通知书

The class dismissed.
下课了。

My parents dismissed me.
我父母抛弃了我。

replace是什么意思：
v. 取代，代替；替换，更换；把…放回原位

Insertion and replacement
插入和替换

She replaced the receiver.
她将听筒放了回去。

a substitute; a substitution; a replacement
代替物