1.account for 对…负有责任；对…做出解释

Jack could not account for his foolish mistake.
杰克无法解释自己的愚蠢错误。

He has to account to the chairman for all the money he spends.
他必须向主席说明他所花掉所有钱的去向。

2.attempt to 尝试，企图

These books attempt to explain why that is, and what, if anything, should be done about it.
这些书试图解释为什么会那样，如果能做的话应该做什么。

We shall attempt to answer it in this book,he wrote.
我们将试图在这本书中回答这个问题，他说道。

3.head for 前往；出发

He headed for me after I called him.
叫了他一声之后，他朝我走过来了。

Then she headed for the Broadway.
然后，她便把目标定在了百老汇。