She had been let down badly in the past.

她过去曾很失望

He trudged home feeling lonely and let down.

他步履艰难地往家走，感到孤独而沮丧。

The company now has a large number of workers who feel badly let down.

现在公司里现在有很多员工感到很失望。

Please let down the curtain.

请把窗帘放下来。

Rapunzel let down the braids of her hair, and the enchantress climbed up to her.

莴苣姑娘垂下她的发辫，女巫顺着它爬了上去。

Don't let down even if the going is good.

即便在顺利的情况下也不要松劲。