not long after 是不久的意思
可以引导从句或加Ving
如
Not long after I switched, I got a tempting offer in the mail from T-Mobile
Not long after composing my letter to Glinda, I visited a dying friend I'll call Sue.
Not long after that I left Jerusalem, but not before I visited Yair again.
这句话的意思是:以上研究结果表明人类的大脑已经不对称的结构和功能在200万年前后不久。(这句话是不是少了些啥)
Not long after 意思是不久之后, after 在这里是副词,not long after 整个用作状语
(the findings above)( suggest that the human brain was already asymmetrical in its structure and function)( not long after )(2 million years ago).
以上研究结果表明,200万年前,人类的大脑很快 就 已经 在结构和功能方面不对称了
suggest that 整个后面都是从句,你要是把not long after 2 million years ago.都去掉后再看看这个句子,是不是也是可以念的通的。not long after /2 million years ago.就是时间状语啦