重點講解：
1. every once in a while
不時；有時；偶爾；
eg. He comes to our room for a chat every once in a while.
他偶爾來我們房中閑談。
eg. I watched things change and made observations every once in a while.
我觀察著事物的變化，時不時地提出我的意見。
2. off-color
不舒服的；身體欠佳的；心情不好；
eg. For three weeks Maurice felt off-colour but did not have any dramatic symptoms.
莫里斯連續3周都不大舒服，但又沒有什么明顯的癥狀。
eg. She's been a bit off - color recently.
她最近氣色不怎么好。
3. take it easy
別太拼命；放松點；
eg. He was going to take it easy when he got back.
他回去以后，要過輕松的日子。
eg. All a man got to do is to take it easy and he'll enjoy himself.
做人只要把心放開些,就能過得快活。
4. rest up
休養，休息；
eg. You had better go home and rest up a little.
你最好回家休息一下。
eg. I think I'll just rest up for an hour or two before starting work again.
我看我還是好好休息一兩個小時再開始工作吧。