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abbr.电阻（resistance）；比率（ratio）；医生处方（recipe）
n.英语字母中的第十八个字母
1、age r r───年龄r r r
2、t r t r───t r t r
3、r and r───abbr.休息和娱乐 (Restand Recreation)
4、so r r y───int.对不起，抱歉（表示委婉的拒绝等）；adj.遗憾的；对不起的，抱歉的
5、a r r───abbr.到达（arrival，arrive）
6、gage r───n.计量者；检量官（等于gauger）
7、e r and r───e r和r
8、r thing───r事件
9、b r───abbr.英国铁路公司 (British Rail)
1、Businesses need to train their workers better, and spend more on R & D.───各企业需要更好地培训其员工，并且在研发上有更多的投入。
2、It is one of the most beautiful compensations in life that no men can sincerely try to help another without helping himself. - R. W.───Emerson人生中最美丽的补偿是，凡设法真诚地去帮助他人，也就在帮助自己。
3、The next letter is R.───下一个字母是“R”。
4、As a young man, R. had a strong sense of social responsibility, believing that art has a duty to society.───罗兰作为青年时便有强烈使命感，相信艺术对社会负有重责。
5、The movie carries an R rating.───这部电影带有限制级R的标志。
6、The third letter symbolizes "READY" , which shows that the hotel attendant is constantly ready to serve guests.───第三个字母R，即是“准备好”，其含义是饭店服务员要随时准备好为顾客服务。
7、Unable to settle on a finale among the many farewells and epilogues in J. R. R. Tolkien's text, director Jackson decided to use them all.───由于无法从J.R.R。托尔金小说中众多的告别场面和尾声中选择哪一个作为结局，导演杰克逊决定将他们全部纳入影片中。
8、One reason for America's angst was that the growth of federal spending on R&D slowed significantly with the end of the cold war.───让美国人感到担心的一个原因是，冷战结束后，研发的财政支出增长大幅减缓。
9、But you will not be able to see him, my poo'r child, an' d even if you could, it would be unsafe fo'r you to make a sign of recognition.───不过你是看不见他的，可怜的孩子，即使看见了，也不能有所表示，因为那对你不安全。