Multiple inheritance supports a much richer inheritance hierarchy for the problems that require it.
如果需要，多重继承支持更丰富的继承层次结构。
Multiple sample program book has been rewritten to correct problems in the program, which used techniques include: improving the consistency of procedures, remove redundant inheritance.
本书对多个示例程序进行了重新编写以改正程序中的问题，其中使用的技术包括：提高程序的一致性、去掉冗余的继承等。
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