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R rack 架子，支架，搁架 a clothes ～ radiate(光，热等)辐射，发射 The sun ～s light and heat radical 根本的，基本的a ～ error rake (长柄)耙，耙机，耙状物 an oyster ～ rally 集合，团结 ～ public opinion in favor of price controls random胡乱的，任意的，随意的，a ～talk range 排，行，一系列 a ～ of buildings rank排，行，列 the ～s of great pines rate 比率，率 Velocity is the ～ of change of distance with respect to time reap 收割，收获 ～ the rice in the field rear 后部，后边，背部a garden at the ～ of the house recall 回忆，回想I ～ seeing a poster on his wall reciprocal 相互的，交互的 ～ respect reckon 计算，数 ～ the days till Christmas reclaim 使改过，改造 ～ former criminals recognize认出，识别 Dogs ～ people by their smell recollect 回忆，想起 I am trying to ～ a forgotten address recommend 推荐，称赞 He ～ed me for the post of headmaster reconcile 使和解，使和好After each fight they ate soon ～d recover 追回，重新得到The police ～ed stolen watch | 
