cut class/cut school逃学Jane was punished because she cut school in
order to join the party.简因为要去派对逃学而被处罚了。

    from the old school 老派的Aunt Helen is from the old school. She loves
to wear a colorful long skirt.海伦阿姨很老派。她喜欢穿彩色的长裙。

    school of hard knocks 从艰苦中习得经验Jeff did not go to school ，
but he went to the school of hard knocks. He learned things by his experience.
杰夫没有上过学，但是他从他的困难中学习成长。

    tell tales out of school散布谣言和秘密Don't trust what Jimmy says.
He never stop telling tales out of school.别相信吉米说的话。他从没停止
散布不实的话和消息。

    the old school tie学校所认识的人脉The old school tie still has enormous
power when you work in some big companies.当你到大公司工作时，学校所认
识的人脉有着很重大的影响。

    schoolboy humor 幼稚的笑话Come on ！ The joke is not funny at all.
That is really schoolboy humor. 拜托！这个笑话一点也不好笑。真的是个幼
稚的笑话。