01.22 sidetrack

1) 翻译：约翰本来想找一个信封，但没想到读起了一些旧时的信件。

John was looking for an envelope and got sidetracked reading some old letters.

2) I was going to the park and got sidetracked with Marry.  

3) 其他积累：

To stay on track means to pay attention to your goal or purpose. But getting sidetracked is just the opposite. A train that is sidetracked gets sent to a different station or down a different line.

To stay on track意思是关注你的目标或目的，但是getting sidetracked正好相反，一条sidetracked的火车会驶向不同的车站或不同的铁路线。