他们学校的老师比我们学校的多（翻译成英文）

纠正一楼一下
Teachers in their school are more than those in ours.

They have more teachers in their school than we do.（同传都这么翻的，虽然你们老师会判他错，这就是XX教育。）

Teachers in their school are more than in ours.

There are more teachers in their school than in ours.