Chalk is used to write on the blackboard while a pen on paper.

粉笔是用来在黑板上写字，而钢笔是用来在纸上写字的。

youdao

Chalk is used to write on the blackboard while a pen on paper.

粉笔是用来在黑板上写字，而钢笔是用来在纸上写字的。

youdao