I'd rather not dwell on the past.
我不想再沉湎于过去了。
 

2.no longer不再
 

After about three months, I was no longer addicted to nicotine.
大约3个月后，我就不再对尼古丁上瘾了。
 

3.pull up减速停下；突然停止
The cab pulled up and the driver jumped out.
出租车减速停下，司机跳了出来。
 

4.fit into融入；归属
It's hard to see how he would fit into the team.
很难看出他将如何融入这支队伍。