The third mode is called signing, which is used by deaf people.

第三种模式叫作手语，听障者经常用这种方式。

Finally, as Desmond Morris documented in his book, Gestures, there are significant regional variations in modern cultures.

之，正如德斯蒙德·莫里斯在他著作《手语》一书中所引样，手语在现代文化中存在着重大地区性差异。

There are, in fact, dozens of gestures that take on totally different meanings as you move from one country or region to another.

事实上，当你从一个国家或地区来到另一个国家或地区时，你会发现许多手语具有完全不同意思。