Do you know how many students have signed up for the course?

你知道有多少学生报名修这门课吗？

youdao

But I know at that time many classrooms were full of students.

但我知道，那个时候，每个教室，都坐满了求知的孩子。

youdao

But I know at that time many classrooms were full of students.

但我知道，那个时候，每个教室，都坐满了求知的孩子。

youdao