当你青丝变白发，你的桃李已满天下。亲爱的老师，向你道声辛苦了！

When you hair become white hair, you of the plum is full. Hard to say to you, dear teacher!

youdao

当你青丝变白发，你的桃李已满天下。亲爱的老师，向你道声辛苦了！

When you hair become white hair, you of the plum is full. Hard to say to you, dear teacher!

youdao