You need to lighten up! 你需要放轻松!
当某人正经八百,或紧张兮兮的时候,你就可以用You need to lighten up! 或 Lighten up!来要对方"放轻松!"
A:We can't go out for dinner! We have to finish this project!
我们不能出去吃晚餐,我们必须做完这个计划!
B:Lighten up! It's not due for days! 放轻松!还有好几天才会结束!
A:Our neighbors are drinking and making so much noise! 我们的邻居在喝酒,吵死了!
B:Lighten up! It's the weekend. They're just having a little fun!
放轻松!今天是周末!他们只是小小娱乐一下!