Where does this concept of putting an X to mean a kiss come from?

这种赋予X亲吻的意思的概念是来自于哪里的呢？

She didn't realise that you don't put an X on every communication.

她没有意识到你不可以在每次通信的过程中都加上X。

It's the idea of the place, it's an X on the map.

这是一个地方的概念，它是地图上的一个地点。

A child may make an X over their heart with their finger while saying it.

当孩子说的时候，他们的手指可能会在胸口划个叉。

The WHO included on its 2019 list, with admirable foresight, a threat labelled " disease X" .

世界卫生组织以令人钦佩的远见，将一种名为“X疾病”的威胁列入了2019年的名单。

Now males males have one X and one Y chromosome, and females have two X chromosomes.

那么，男性有一个X染色体和一个Y染色体，女性有两个X染色体。

So they are capital x, y.

所以他们是大写的x，y。

Well, if X equals the amount that you'll miss me, then I'll miss you X plus one.

好吧，如果你想我的次数是X那我想你的次数就是X加一。

I was asking them what kind of shampoo they bought and if they preferred brand X to brand Y.

我问他们买什么样的洗发水，相比品牌Y他们是不是更喜欢品牌X。

Radiation also applies to rainbows and a doctor examining an x-ray.

辐射同适用于彩虹和医生检测用的X射线。

We're going to take an x-ray and see how you do.

我们要给你拍个 x 光片，看看情况如何。

Hang on, hang on. So that x-ray is a real x-ray of you?

等一下，等一下，所以这个Ｘ光片是你自己？

So we need to generate 5 x's. How can we do that?

所以我们需要生成 5 个 x。我们该怎么做？

Finally, the doctor took an x-ray and put my leg into a cast.

最后医生拍了X光片，并给我的腿打了石膏。

What we do is we produce extremely bright x-rays with the central facility.

我们所做的是用中心设备产生极其明亮的x射线。

He wants it to be an Asian-style everything app, and calling it X is, supposedly, the first part of that plan.

他希望它成为一个亚洲风格的可以完成一切的应用程序，并称其为 X，据说是该计划的第一部分。

Bacho Khachidze and Lasha Kvantaliani developed Trip X in response to the danger air pollution poses to anyone who breathes it.

Bacho Khachidze和Lasha Kvantaliani开发的旅行X目的是响应的空气污染对人的呼吸系统的影响。

He opened a pamphlet and spread out a diagram he called " an x-ray of our global economy."

他打开一本小册子，铺陈图表，称之为“全球经济透视图”。

For example, some of the questions on your exams might ask you which of the following is not X, Y or Z.

例如，你考试中的一些题目可能会问你以下哪一个不是 X、Y 或 Z。

The unknown planet X, X marks the spot of unknown treasure, and now nerds' love of X has grown beyond the unknown.

未知的行星 X，X 标志着未知宝藏的地点，现在书呆子对 X 的爱已经超越了未知。