在完成本教程后，您可以学习到该语言的基本内容，包括格式化输出、记录和字段操作以及模式匹配。
By the time you have completed the tutorial, you will have learned the rudimentary aspects of the language, including formatting output, record and field manipulation, and pattern matching.
每一种格式都会用到一个数值实参来告诉格式化程序如何适当地应用模式。
Each type of format can take a numerical argument as well, to tell the formatter how to properly apply the pattern.
Format date函数还包含一个模式，指定如何将给定的日期和时间格式化。
The format date function also contains a pattern to specify how the given date and time will be formatted.
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