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

第三种模式叫作手势语，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.

总，正如德斯蒙德·莫里斯在他的著作《手势语》一书中所引证的那样，手势语在现代文化中存在的地区性差异。

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，你会发现许多手势语具有完全不同的意思。