释义：
let somebody down 让某人失望
同样是 let somebody 后面接副词的情况，let somebody down 表示“让某人失望”。...let me down, ... let you down 等都是常用的形态。
例句：
I'll try not to let you down.
我不会让你失望的。
You let me down this year, Jimmy.
你今年很让我失望啊，吉米。
You didn't let me down. You did the right thing.
你没有让我失望，你做的没错。
对话：
A: Don't let me down.
不要让我失望。
B: Don't worry. I'll get it done for you.
不要担心，我会帮你做的。
