boxing conversions meaning in Chinese

封箔转换
封箱转换

As operator only performs reference conversions and boxing conversions
运算符只执行引用转换和装箱转换。
Operator only considers reference conversions , boxing conversions , and unboxing conversions
运算符只考虑引用转换、装箱转换和取消装箱转换。
Enumeration types are value types and participate in boxing conversions as other value types do
枚举类型是值类型，它和其他值类型一样参与装箱转换。