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

recruit 招募(新兵)招收(新成员)try to ～300 men in two days

rectify纠正，改正，矫正 ～ the mistakes in a bill

refer 提到，谈到 Does the remark ～ to me

refine 提炼～ crude oil into various petroleum products

reform 改革，改良 He spend years trying to ～ the world

refute驳斥，驳倒 The argument cannot be d at the moments

regard 看待，认为，对待 I ～ the matter in this light

regenerate 使恢复，使复兴，再生The human body can ～ hair, nails, etc

regulate管理，控制，为……制订规章 The policeman ～d traffic at the intersection

reign 为王，统治In England ,the sovereign ～s but does not rule

reinforce 增援，加强 They hope to ～ their domination in these countries