讲解：
free sb / sth / yourself (from sth)
解放；使摆脱
Three people were freed from the wreckage.
有三人被救出残骸。

approve (of sb / sth)
赞成；同意:
I told my mother I wanted to leave school but she didn't approve.
我告诉母亲我不想继续上学,但是母亲不同意。

sth multiply
成倍增加；迅速增加:
Our problems have multiplied since last year.
自去年以来,我们的问题成倍增加。

open (to sb)
可得到；可使用:
What options are open to us?
我们有什么选择？

wipe sb / sth out
彻底消灭；全部摧毁:
Whole villages were wiped out by the earthquake.
地震把整座整座的村庄夷为平地。

belong to sb
属于某人；归某人所有:
Who does this watch belong to?
这块表是谁的？