Don't let my son know about it.

别让我儿子知道这件事。

youdao

Don't let my sickness concern you.

不要因为我的病而让你担忧。

youdao

I let my feelings be my guide.

我是跟着感觉走。

《牛津词典》

So I decided to celebrate, have some fun and let my hair down.

VOA: special.2009.05.03

I have said to you, "Let my son go, that he may worship Me," yet you refuse to let him go.

我已经告诉过你，“让我的孩子离开，他要崇拜我“,但是你却不让他走。

耶鲁公开课 - 旧约导论课程节选

I need to know how long, so that I can let my roommates know.

我得知道大概有多久，这样我就可以告诉我的室友们了。

How long实战 - SpeakingMax英语口语达人

Or I transfer the Dollars and let my bank in BE convert it to Euros.

FORBES: Faster, Better, Cheaper Ways To Transfer Money - Chapter 1: Paypal

Or, let my mother-in-law download just her email at an even smaller price point.

NPR: Opinion Page: Network Neutrality on the Internet

But in life as in study, I was too ambitious to let my nerdiness hold me back.

ENGADGET: Growing Up Geek: Christopher Trout Alt