RD: I only became fired up in my second year of a science degree.

理查德·道金斯：我在读理科硕士的第二年才有过这样的想法。

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In the light of the characteristics of P2P group communication, we define two graph metrics, RH and RD, to quantify the matching degree between the overlay and the underlay network.

针对P 2p组通讯的特点，定义了根跳距和根距离两个拓扑特征指标参数来衡量测试拓扑图和底层网络的吻合程度。

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