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）.
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