数据传输对象是将一组值包装在一个对象中的方法，目的在于经济地传送这些值。
A Data Transfer object is a way to package a collection of values in a single object so they can be passed around economically.
使用唛头的目的在于能够识别箱、袋或包装。
The purpose of a shipping mark is to enable identification of a box, bag or package.
在市场营销中，包装的目的还在于提高和广告待售商品的吸引力。
In marketing, the package also aims for promoting and advertising the attractiveness of goods to be sold.
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