泛型相当有用，因为他们提供强制的编译时类型检查，要求更少的数据类型之间的显式转换，并减少装箱拆箱的操作和运行时类型检查。
Generics are useful because they provide stronger compile-time type checking, require fewer explicit conversions between data types, and reduce the need for boxing operations and run-time type checks.
国际集装箱、散货进出口运输；拆拼箱、货物分拨；空运；多式联运；报关报检；私人物品国际运输；综合物流配送服务。
International container import and export transportation, FCL and LCL, air freight, Multimodal transport, Custom and Inspection, personal staff international transportation, multi-logistic services.
当把一个“数据”从值类型转换成引用类型的时候，就叫做“装箱”，反之叫做“拆箱”。
When the data moves from value types to reference types its termed as 'Boxing' and the vice versa is termed as 'UnBoxing'.
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