Yabla Chinese

Yabla video uses of 较差
是 shì
用于 yòngyú
空气 kōngqì
质量 zhìliàng
较差 jiàochā
的 de
环境 huánjìng
and are used in environments where air quality is relatively poor.
我 wǒ
是 shì
考 kǎo
第 dì
三十 sānshí
一 yī
名 míng
就 jiù
比 bǐ
较差 jiàochā
I would rank thirty-first in class, considered to be quite a bad student.