R, r

n (pl R's, r's / B:z; Brz/) 1 the eighteenth letter of the English alphabet 英语字母表的第十八个字母: `Rabbit' begins with (an) R/`R'. rabbit一字是以r字母开始的. 2 (idm 习语) roll one's r's => roll2. the three `R's reading, (w)riting and (a)rithmetic, as the basis of an elementary education 基本三会（指作为初等教育基础的读、 写、 算）.

quixotic, quixotically, quiz, quiz-master, quizzical, quizzically, quod, quoit, quorum, quota, quotable, quotation, quotation-marks (also quotes), quote, quote from, quoth, quotidian, quotient, R, R and D, RA, rabbi, rabbinical, rabbit, rabbit punch, rabbit-hutch, rabbit-warren, rabbity, rabble, rabble-rouser, rabble-rousing, Rabelaisian, rabid, rabies, RAC, raccoon (esp US) (Brit also racoon), race, race relations, race-meeting, race-riot,