Let x be the sum of a and b.

设x为a加b之和。

《牛津词典》

In one of its rooms, you can also have a chance to know how X-rays let you see inside your body.

在其中一个房间里，你还可以有机会了解 X 光是如何让你看到身体内部的。

youdao

Let x be the equal of y.

设 x 等于y。

《新英汉大辞典》

And that's the following. Let's take a particle that is moving in the x-y plane, so that at one instance-- sorry, let me change this graph-- is here--oh, this is bad.

接下来,我们来看一个物体,在 x-y 平面内运动,在这个例子中,对不起,我要重画一下这个图,在这里,这画得不好

耶鲁公开课 - 基础物理课程节选

Let's be clear: the 1, 792 x 768 resolution ultimately amounts to your garden-variety 1, 366 x 768 with some extra horizontal pixels.

ENGADGET: Toshiba Satellite U845W review: an Ultrabook with a screen size all its own

The e-paper slate is quite a lot bigger than most tablets, let alone e-readers, sporting a 13.3-inch screen (1, 200 x 1, 600) to match the standard A4 size of normal, boring paper.

ENGADGET

Creative's Zii EGG may be snagging the majority of headlines for the company these days, but it looks like it's not about to let its regular PMPs fall by the wayside, and it's now announced its new Zen X-Fi2 player that ditches the few buttons found on the original Zen X-Fi in favor of full touchscreen controls.

ENGADGET: Creative announces Zen X-Fi2 touchscreen PMP (video)