重点讲解：
1. indulge in
沉迷；放纵；
eg. Only rarely will she indulge in a glass of wine.
她只是偶尔才喝杯红酒，让自己享受一下。
eg. Don't always indulge in empty talk.
别总是纸上谈兵。
2. go on to do sth.
（做完某事后）进而，接着（做另一件事）；
eg. He would later go on to win the Nobel Prize for Physics.
他后来赢得了诺贝尔物理学奖。
eg. Go on to do the other exercise after you finish this one.
做完这个练习题后，接着做另一个练习题。
3. vis-a-vis
n. 面对面的人；
eg. We used to sit vis-a-vis in here.
我们以前在这儿面对面的坐着。
eg. At the banquet table, I had the good fortune to sit vis-a-vis an old school chum.
在宴会桌上，我恰巧坐在一位老同学的对面。