practical joke
trick played on sb for amusement, usu involving some physical action 恶作剧
The children put salt in the sugar bowl as a practical joke. 孩子们玩恶作剧把盐放进了糖罐里. ,practical `joker person who plays practical jokes 玩恶作剧的人.
The best teachers of humanity are the lives of great men.
启迪人性最好的导师是伟大人物的生活。
living in a world in which undeclared aggression, war, hypocrisy, chicanery, anarchy and impending immolation are part of our daily lives, we all want a code to live by.