For a node, the number of polling cycles that intervene between successive polls, for example, a node with a polling ratio of 5 would only be polled once every five polling cycles. (The use of polling ratio permits inactive nodes to be polled less frequently than active nodes.); 對于某一網(wǎng)點,在連接二次輪詢之間所經(jīng)過的輪詢周期的次數(shù)。例如,某點的輪詢率為5,就是說該點在5個輪詢周期內(nèi)只能 有一次被輪詢。(使用輪詢率就允許尚未激活的網(wǎng)點被輪詢的次數(shù)低于已激活網(wǎng)點的次數(shù)。)