1.Attempting to unbox null or a reference to an incompatible value type will result in an InvalidCastException.
尝试对null或对不兼容值类型的引用进行取消装箱操作，将导致InvalidCastException。
2.Its Amazon Video On Demand is the new name for Amazon Unbox, launched two years ago.
这项服务名为AmazonVOD，是该公司两年前推出的AmazonUnbox服务的新名称。
3.When you unbox it you'll find that it comes with an American plug.
当你拆开包装你会发现附带了一个美式插头。
4.For the most part, Pyrex runs faster than Python by avoiding the need to continuously box and unbox variables of simple data types.
对于大部分情况来说，Pyrex不需要不断对简单数据类型变量进行装箱（box）和拆箱（unbox）操作，因此速度比Python更快。
5.And unbox data destined for output. Boxing and unboxing reduce performance.
而且还要将预定输出的数据进行取消装箱操作。
6.When using value types, you have to box them in order to push and store them, and unbox the value types when popping them off the stack.
在使用值类型时，必须将它们装箱以便推送和存储它们，并且在将值类型弹出堆栈时将其取消装箱。
7.Attempting to unbox null or a reference to an incompatible value type will cause an InvalidCastException.
尝试取消装箱null或对不兼容值类型的引用会导致InvalidCastException。
8.Shows how to use safe_cast to unbox a value on the CLR heap.
说明如何使用safe_cast将CLR堆上的值取消装箱。