党组书记secretary, Party Leadership Group
【化学】与环结合起来的酮群而不是六元芳环keto group bound to rings other than six-membered aromatic rings
吸电子取代基electron with-drawing group
在线团购online group purchase
团购group purchase
巯基sulfhydryl group
曼集团Man Group
组合控制图group control chart【计划】