Yabla video uses of 较差

shì
用于 yòngyú
空气 kōngqì
质量 zhìliàng
较差 jiàochā
de
环境 huánjìng
and are used in environments where air quality is relatively poor.
shì
kǎo
三十 sānshí
míng
jiù
较差 jiàochā
I would rank thirty-first in class, considered to be quite a bad student.