It's a bit inconsiderate of her not to let you know when she expects to arrive.

她不让你知道她什么时候会到，这样做有些不体谅人。

《柯林斯英汉双解大词典》

They want to let them know that they are safe.

他们想让他们知道，他们很安全。

《柯林斯英汉双解大词典》

If you don't want to come, fair enough, but let Bill know.

你要是不想来，可以，不过要让比尔知道。

《牛津词典》

In a poker game you do not want to let your opponents know if your cards are good or bad.

VOA: special.2009.11.22

So if I call, let's , let's set up s to be, I don't know, some big long list.

那让我们来调用一次吧，让我们建立一个，怎么说。

麻省理工公开课 - 计算机科学及编程导论课程节选

The socialization whereas to know each other, to create bounds and relationships and also let time out, let time out to learn.

而社会化就是相互了解，构建联系和友谊,及腾出时间学习。

麻省理工公开课 - 媒体、教育、市场课程节选

The fork has another trick up its sleeve too, which is that when it thinks you're eating too fast, it'll vibrate when you put it to your lips to let you know to slow down, cowboy.

ENGADGET

In so doing, it let users know that it was going to do that and updated the site to let them know how many were left.

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And so my therapist, you know, psychologist was taking me around, trying to just, you know, dip me in a little bit to let me know, you know, this is the business here that you've been in all your life.

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