let down

柯林斯词典

1. PHRASAL VERB If you let someone down, you disappoint them, by not doing something that you have said you will do or that they expected you to do. 使失望
Don't worry, Xiao, I won't let you down. 不要担心，肖，我不会让你失望的。
2. let downADJ 失望的[v-link ADJ]
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。
3. PHRASAL VERB If something lets you down, it is the reason you are not as successful as you could have been. 使失败
Many believe it was his shyness and insecurity which let him down. 许多人认为是他的胆怯和缺乏安全感使他失败。