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1·'I won't let you down,' he replied.

“我不会让你失望的。”他回答说。《牛津词典》

2·Don't worry, Xiao, I won't let you down.

不要担心，肖，我不会让你失望的。《柯林斯英汉双解大词典》

3·'I won't let you down,' he replied confidently.

他信心十足地答道：“我不会让你失望的。”《牛津词典》

4·If you put your trust in me, I will not let you down.

你要是信赖我，我就不会让你失望。《牛津词典》

5·If anyone here has problems with your shoes, please come to me and I will not let you down.

如果这里有人的鞋子有问题，请来找我，我不会让你失望的。

6·This machine won't let you down.

你尽管放心，这台机器不会出毛病。《牛津词典》

7·Believe in me, and I won't let you down in the test.

相信我，这次考试我不会让你们失望。

8·Gomenasai, I know i let you down.

对不起，我让你失望了。

9·And I don't want to let you down.

我不想让你们失望。

10·Harry will never let you down.

哈里永远不会让你失望。