重点讲解：
1. all the time 一直；
I got a new job this year where I am on the go all the time.
我今年找了份新工作，一直忙得不可开交(ww%XOibM~LM。
2. back and forth 来回；往返；
He paced back and forth.
他来回踱步@a0!Ij(4woFSrCw。
3. relate to 相关；有关联；
All these questions relate to philosophy.
这些问题都跟哲学有关oMsU.cyOuKgab@O。
4. at long last 终于；最后；到底；
Here, at long last, was the moment he had waited for.
他等待已久的时刻终于到来+XVB|JFt*12fCxS~11B1。