I am sorry to let you down.

对不起，让你失望了。

youdao

I am most awfully sorry to let you down.

叫您失望我感到非常抱歉。

youdao

Grovyle: I'm sorry to let you down. This is where it ends.

森林蜥蜴：很抱歉让你们失望了。一切都结束了。

youdao

I'm sorry to have let you down.

很抱歉让你失望了。

youdao

I'm sorry to have let you down.

我很抱歉让你失望了。

youdao

Sorry to have let you down.

对不起，让你失望了！

youdao

Sorry to have let you down.

对不起，让你失望了！

youdao