R and D

abbr 缩写 = (commerce 商) research and development 研究与开发.

quiver, 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, r, 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,