课程纲要是不可替代的学习材料。

There is no substitute for studying the original material.

youdao

当然了白日梦不能替代努力的学习。

Of course, daydreaming is no substitute for hard work.

youdao

当然了白日梦不能替代努力的学习。

Of course, daydreaming is no substitute for hard work.

youdao