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I understand that multiple links fro a site dilute link juice. Some people think that Google still operates this way.  Nobody knows for sure. However, multiple links to excellent external targets could have benefits that are enormous when compared to linkjuice loss. On important pages I don't hesitate to place multiple links to authoritative, relevant and trusted targets. I wonder if there is an ideal ratioof tgese two items. No. One should maximize both within reason and do what will impress the visitor.