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K是适配器的种类的数目,而不是适配器的数目The store does not have adapters for all possible combinations of plugs and receptacles, But there is essentially an unlimited supply of the ones they do have. ,^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 原来是自己理解错了,开始理解成只有K个适配器,还在纳闷为啥能用匹配做··· Followed by:
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