开始阅读这本书籍，作者从计算打孔机开始讲起，看来半天快要睡着的时终于进入正题：

JavaScript的基本数据类型：

There are six basic types of values: Numbers, strings, booleans, objects, functions, and undefined values.

数据类型位数：

Fractional numbers are written by using a dot.

For very big or very small numbers, one can also use 'scientific' notation by adding an e, followed by the exponent of the number:

分数用小数点表示，(未完待续)