He'd eat chocolate all day long if I let him.

我要是不拦着，他会整天不停地吃巧克力。

《牛津词典》

If I let it fall, then that will be converted to kinetic energy.

如果我让它落下，那么势能会转化为，动能。

youdao

If I let you alone for half a day, won't you come sighing and wheedling to me again?

如果我让你自己一个人待半天，你会不会又叹着气走过来，又跟我甜言蜜语呢？

youdao

Let's see if I can name a few off the cuff, or without any preparation.

VOA: special.2010.05.02

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

But I want you to see now what happens if I use this. Let's bind x to the value of 3.

但是我想你看看如果我这么用的话,会发生什么。

麻省理工公开课 - 计算机科学及编程导论课程节选

And, second, what might I get in exchange if I let this pass?

ECONOMIST: The line-item veto

One was talking on the phone (or pretended to be), and the other, the leader, asked if I could let them in to meet a friend in the building.

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But if I remember -- let me take you back perhaps to the period after the Second World War when, through the Marshall Plan, Germany was able to get back on its feet again.

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