1.lie on one's back  朝天躺着   

2.go from bad to worse  每况愈下     

3.go bad(wrong/hungry)  变腐   

4.keep(lose) balance  保持（失去）平衡

5.be in the balance  悬而未决    

6.ban (prohibit) sb from doing sth  禁止某人做某事

7.under a ban  被禁止     

8.base sth on/upon sth  以...为基础

9.be based on  基于

10.on..basis/on the basis of  以...为根据;在...基础上

11.battle against  向...开战    

12.battle with  与...搏斗  

13.battle for  为...而战

14.in bed/on the bed  在床上

15.make the bed  整理床铺