metatable
美
英 
例句
A metatable is a (normal) Lua table that maps standard operations to custom functions that you provide.
元表是一个(普通的)Lua表,它将标准操作映射成我们提供的函数。
The keys of the metatable are called events; the values (in other words, the functions) are called metamethods.
元表的键值称为事件;值(换而言之就是函数)称为元方法。
Each table and userdata object can have its own metatable.
每个表和userdada对象都可以具有自己的元表。