He was afraid of letting down his parents, so he studied hard to get into university.

他很害怕让他的父母失望，所以努力学习考上了大学。

youdao

I have a dread of letting down Ray's contributors, who are expecting to see their work in his magazine.

我很害怕自己会让雷的撰稿人们失望，他们都希望看到自己的作品出现在他的杂志上。

youdao

When I was in middle school, I felt I was always letting people down.

我上中学的时候，我觉得我总是让人失望。

youdao

"It's really standing firm and not letting those kinds of questions get you down because they are going to come."

VOA: standard.2010.02.25

And, yes, it is a form of letting down your teammates and the fans.

FORBES: Should Barry Bonds Be in the Hall of Fame? Do Top Performers Get a Pass on Integrity?

But that movie, which took so long to get made, ended up letting down legions of fans.

FORBES: Connect

The HSE's principal inspector for the West, said some sites were letting down the rest of the industry.

BBC: England