重點講解：
1. indulge in
沉迷；放縱；
eg. Only rarely will she indulge in a glass of wine.
她只是偶爾才喝杯紅酒，讓自己享受一下。
eg. Don't always indulge in empty talk.
別總是紙上談兵。
2. go on to do sth.
（做完某事后）進而，接著（做另一件事）；
eg. He would later go on to win the Nobel Prize for Physics.
他后來贏得了諾貝爾物理學獎。
eg. Go on to do the other exercise after you finish this one.
做完這個練習題后，接著做另一個練習題。
3. vis-a-vis
n. 面對面的人；
eg. We used to sit vis-a-vis in here.
我們以前在這兒面對面的坐著。
eg. At the banquet table, I had the good fortune to sit vis-a-vis an old school chum.
在宴會桌上，我恰巧坐在一位老同學的對面。