前: frontr: r = 1.refrigerator. 2. ...前s基团: pro-s group前r-r间期: preceding r-r interval基团: assembly; base group; functional group; radical前: Ⅰ名词1.(在正面的) front 前门[院] front door [courtyard]2.(次序在先的) first; top 前六排座位 the first six rows of seats; 前三名 the first three places; 比赛将决出前八名。 the matches would decide the top eight.3.(过去的; 较早的) ago; before; preceding 解放前 before liberation; 前一阶段 the preceding stage; 日前 a few days ago; the other day; 30年前 thirty years ago; 晚饭前 before supper; 战前 prewar4.(从前的) former; formerly 前市长 former mayor; ex-mayor; 前校长 former principal of a schoolⅡ动词(向前进) go forward [ahead]: 畏缩不前 recoil in fear; hesitate to press forward; 勇往直前 go bravely forward; forge ahead dauntlesslya r: 简写的; 约略r: R=80000。 the ‘r' [R] months 九月到四月〔牡蛎当令的季节,月名都含有 r 字〕。 the three R's (作为初等教育基础的)读写算 〔reading, writing, arithmetic〕。 R = 1.〔拉丁语〕 recipe 【医学】处方。 2.radical. 3.Reaumur. 4.〔拉丁语〕 Rex, Regina. 5.radius. 6.ratio. 7.resistance. 8.retree. 9.roentgen. 10.range. 11.registered. 12.rifle. 13.regulating. r = 1.refrigerator. 2.rod. r a: 抽油杆和油管r and: rr and r, r & r1.=rest and recuperation (leave) 【美军】(正常例假以外的)休整假期。2.rock'n'roll 摇滚舞(曲)。; 每年给予美国军人除三十天例假外的五天休养假r of s: 系统复查,系统回顾r or: rno rales or rhonchi 无干湿罗音; 无干湿罗音s r: 刺激t or r: 触疼或反跳疼t r: 度母; 吐兰t-r: 收发两用机氨基团: aminogroup基团加: kitwanga基团块: block of genes基团数: grounumber hlb马基团: maquismaquisard阈基团: threshold geneno r or r: rhonchi]无干湿音; 无干湿音r and r: R and R, R & R 1.=rest and recuperation (leave) 【美军】(正常例假以外的)休整假期。 2.rock'n'roll 摇滚舞(曲)。 亲油基团 亲油基团: lipophilic group