重点讲解：
1. go back to/return to
回到；
eg. She'll never go back to her husband. She's done with him for good.
她将不会回到她丈夫身边了，她这样做也是为他好。
eg. He wants to give away all his modern possessions and return to nature.
他要舍弃一切时髦的东西而归真返璞。
2. kick in
开始生效；起作用；
eg. As mentioned earlier, telepathy is most likely to kick in under circumstances of emergency.
正如前面提到的，心灵感应很可能要在危急关头才会出现。
eg. Such policies take time to kick in, but some of the measures will have had an effect on second-quarter results.
这些政策需要一定时间才能发挥作用，但其中一些政策会对第二季度的经济数据产生效果。
3. come back
回来；
eg. There is no telling when she will come back.
说不准她什么时候回来。
eg. That they've hung on and come back is amazing.
他们能够坚持下去并卷土重来这个事实是令人惊异的。