他的英语成绩好，但数学成绩差。

He did well in English but badly in maths.

youdao

过去我的英语非常差，通过老师耐心的指导，我的数学成绩得到很大程度的提高。

My English is very poor in the past, through the guidance of the teacher patiently, my math has been largely improved.

youdao

父亲在看他那满怀希望的儿子带回来的学习成绩单，他边看边露出愤怒的表情：“英语，差；

Thee father was reading the school-report which had just been handed to him by his hopeful son. His brow was wrathful as he read:"English, poor;"

youdao