说明：  详细讲解了LAB VIEW里面变体的组成，使用，转换成特定数据类型及描述方法，使初学者彻底弄清楚变体变体与各类型数据转换机理。
(Explained in detail the composition, use and transformation of variation in LAB VIEW into specific data types and description methods, so that beginners can thoroughly understand variation and data conversion mechanism of each type.)