9. A good rest in bed is all you need, and drink more water.
你需要好好休息，多喝水。
還能這樣說：
Remember to take a good rest and drink more water.
You should have a good rest and drink more water.
諺語：
A good winter brings a good summer.
瑞雪兆豐年。
10. Just keep the bandage dry and come back in 3 days.
保持繃帶干燥就行了，3天后回來復診。
還能這樣說：
You must keep the bandage dry and return in 3 days.
Avoid the bandage being wet and come back for a re-examination 3 days later.
應用解析：
as dry as a bone 干極了；口渴極了；
go dry 頒布禁酒令；
have not a dry thread on 渾身濕透；
in the dry 沒弄濕；沒碰上雨
11. How long have you been like this?
你這個樣子多久了？
還能這樣說：
How long has it been like this?
How long has it lasted?
諺語：
Joy often comes after sorrow, like morning after night.
暮去必將朝至，苦盡常會甜來。
12. I am sure that you got the flu.
我很肯定你得了流感。
還能這樣說：
Definitely you have fallen sick with flu.
I firmly believe that you had the flu.
應用解析：
be sure to 務必，一定要；
be sure of oneself 自信；滿懷信心