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开放式目录 [kai1 fang4 shi4 mu4 lu4] Open Directory Project
开放式系统 [kai1 fang4 shi4 xi4 tong3] offenes System
开放式最短路径优先 [kai1 fang4 shi4 zui4 duan3 lu4 jing4 you1 xian1] Open Shortest Path First