So, I'm holding a couple of microdots that have been concealed behind a stamp.

我手里拿着几，它们被藏在邮票后面。

And so if you can see there's a microdot in each corner.

你可以看到这里每角落都有一。

When this stamp is put onto an envelope, these microdots become absolutely invisible.

当把邮票放到信封上这些就完全看不见了。

Next, I'm going to talk about microdot technology.

接下来，我要技术。

The microdot is a very secure method of communication.

是一种非常安全的通信方式。

A microdot is taking an 8.5 by 11 page of text, just a regular piece of paper, and reducing it down.

一是将一张普通的 8.5 x 11 的文稿缩小。

Even if someone hands you the magazine and says, " There's a microdot in the magazine, " you will never, if you don't know the page, and the paragraph, and the sentence, you won't find the microdot.

即使有人递给你杂志，说：" 杂志里有。" 如果你不知道是哪一页、哪一段、哪句话，你永远也找不到这。