重点讲解：
1. all in all 总的说来；从各方面来说；总之；
例句：All in all, it was a great success.
总之，是很成功的DrP4(_Vs!Sk。
2. once in a while 偶尔；间或；
例句：Once in a while we go to a restaurant but usually we eat at home.
我们偶尔下馆子，但一般都在家吃)@%y~79PWkz-okf-Gk7.。
3. no problem 不客气；
例句：-Thanks for helping me move into my new apartment. -No problem. Call on me anytime.
谢谢你帮我搬家到新的公寓V4AOY#wx5vm&gVNm。不用客气，你随时都可以找我i.5S+s+0mzttz|5DxS。