retarded
retarded/riˈtɑ:did/adj.智力迟钝的，发展迟缓的：a mentally retarded child弱智的孩子Lucy is very retarded and can't read yet.露西在智力方面发育十分迟缓，至今还不识字。
retell
retell /ˈri:ˈtel/vt. (retold, retold)复述，重述：Let me try retelling the story.让我试着复述这个故事吧。The students had to retell the story in their own words.学生必须用自己的话···
retention
retention/riˈtenʃən/n.［u］保留，保持（正式用语）：water(heat) retention水（热）保持；the retention of these painting保留这些油画The retention of old technology has slowed the c···
retire
retire/riˈtaiə/vi.(from; to) 1.退休：retire at 60 60岁退的休；reach retiring age到退休年龄；a retiring allowance退休金2.退出，退下：He retired to his room.他回到自己的房间。She r···
retort
retort/riˈtɔ:t/ I.n.［c］&［u］反驳，答辩: provoke a humorous retort激起富有幽默的反驳；say a few words in retort反驳几句；be quick at retort善于回嘴，敏于答辩‖II.vt.&vi···
retreat
retreat/riˈtri:t/vi.(from; to)撤退，退却：force the enemy to retreat迫使敌人退却；retreat after heavy losses遭受重大损失后撤退；retreat from reality逃避现实；retreat to one’s off···
retrieval/retrieve
retrieval/riˈtri:vəl/n.重获取回，检索，挽回，恢复：an information retrieval system信息检索系统；the retrieval of one's fortunes恢复某人的财产retrieve/riˈtri:v/vt.1.重新得到，···
retrospect/retrospective
retrospect/ˈretrəspekt/n.［u］&［c］回顾：a brief historical retrospect简单的历史回顾in retrospect回想起来，事后看来：［考句］One’s university days often appear happier in r···
return
return/riˈtə:n/ I.vt.&vi.1.回来，返回(不和back连用)：He suddenly returned on a rainy night.一个下雨的晚上他突然回来了。He is returning tomorrow.他明天回来。2.还；归还：Shall ···
reunification
reunification /ˌri:ju:nifiˈkeiʃən/n. [u]重新统一，重新团结：the irresistible momentum towards reunification of the two countries两国统一的不可抗拒的势头
