质量差英文

这东西质量太差，我才用了一天就坏了 This stuff is nothing but a lemon,it's out of order just after one day use // lemon n （口语）质量差的东西，次品 out of order adv 坏了

这东西质量太差,我才用了一天就坏了This poor quality, I only use a day it broke

经常睡眠质量差怎么办

What do you do with poor sleep quality

重点词汇

是of poor quality或者of low quality也可以