问题描述：
分析一下此句英文的语法结构
If the size of the wrapped type is very small,the overhead caused by multiple inheritance is potentially more than is tolerable.
翻译：
如果被包装的类型的大小非常小,那么多重继承带来的额外开销就不是可以接受 的了.
特别是最后的is tolerable比较难理解,the overhead is poentially more than is tolerable.这样的结构有两个is,算哪种类型呢?
If the size of the wrapped type is very small,the overhead caused by multiple inheritance is potentially more than is tolerable.
翻译：
如果被包装的类型的大小非常小,那么多重继承带来的额外开销就不是可以接受 的了.
特别是最后的is tolerable比较难理解,the overhead is poentially more than is tolerable.这样的结构有两个is,算哪种类型呢?
问题解答：
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