请问as在这句话的用法

*** ad. (副词 adverb)
跟...一样地,同样地
Sam is as rich as Alexander.
山姆像亚历山大一样富有。
如同;例如
Such animals as foxes and squirrels have bushy tails.
有些动物,如狐和松鼠,有蓬松的尾巴。

*** prep. (介系词 preposition)
作为,以...的身分
She works as an interpreter in that company.
她在该公司里担任翻译员。
当作
She didn't think much of him as a painter.
她对他作为一位画家评价不高。
像;如同
The old woman was dressed as a young lady.
这位老妇人打扮得像一位年轻人。

*** conj. (连接词 conjunction)
像...一样;依照;像
You ought to do as Paul tells you.
你应按照保罗吩咐的做。
The work is not so difficult as you imagine.
这工作不像你想像的那麼困难。
当...时
As she left the room she remembered that book.
她离开房间时想起了那本书。
随著
As the sun rose the fog dispersed.
太阳一出来,雾随之消失。
因为
We didn't know what to do as we were just visiting there.
我们不知道该怎麼办,因为当时我们仅仅在那里作访问。
虽然
Tired as he was, he sat up late.
他虽然疲倦,可仍然很晚才睡。

*** pron. (代名词 pro