短语：
act as 充当；作为；担任
act on ...的法案；对...起作用；按照...行事
act in 扮演；在...方面行动
例句：
We act as though we have godlike powers to decide our own destiny.
我们表现得好像我们拥有神的力量来决定自己的命运似的。
It will act as the follow-on to the current version of the software.
它将是此软件现行版本的换代产品。