计算机这一高科技产品已被广泛应用在我们生活、工作的各个领域，但是，它与人交流的手段还主要是一种“无声”的方式：大量的数据主要依靠键盘、手写的方式输入；操作计算机、发布指令也必须通过键盘、鼠标的手工控制。这种单一的人机交流方式，给我们使用计算机带来了很... The high-tech computer has been widely used in all fields of our life and work. However, the means of communication with people is mainly a “silent” way: a large amount of data mainly relies on the keyboard and handwriting input; Operate the computer, release instructions must also be manually controlled by the keyboard, mouse. This single way of human-computer interaction has brought us a lot of computer ...