- pro-s group
- 前: front
- s: the collar of S [SS, S ...
- 前r基团: pro-r group
- 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 dauntlessly
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