group: implies some unifying relationship and ordinarily a degree of physical closeness: a ~ of people waiting for a bus.   （如group discussions分组讨论working groups工作/项目组，group buying/purchasing组团购物）     （"组"中的糸指"丝带"，"且"表示物品，糸且合用表示用丝为贯穿把物品连接统合，如组合组织组建组成小组分组组曲组诗一组电池。组和群的区别是：组具有明确的目的和分工，即解释中的unifying relationship有明确关系，如项目组、学习小组，用于正式场景；而群的关系松散、缺乏分工、加入门槛较低，常用于社交场景，如微信群、兴趣群）


cluster: basically refers to a group of things growing together: a ~ of grapes; but it is often extended to persons or things that form small groups especially within larger masses: cataloging ~s of stars.   如计算机集群computer cluster花团锦簇flowers in clusters星簇clusters of stars    


bunch: is likely to imply a natural or homogeneous association of similar things or persons: a ~ of bananas.     强调自然、相似、均匀，如a bunch of grapes/keys/flowers/stuff一串葡萄/钥匙/一束鲜花/一堆活儿


parcel: is likely to convey an impression of disapproval: the whole story was a ~ of lies.  一派谎言          另一个意思是(特别是邮递的)包裹something wrapped in paper especially sent by post如there's a parcel and some letters for you有你的一个包裹和几封信，如food parcels食品包裹


lot: applies to persons or things that are associated or that have to be dealt with as a whole: the books were sold in ~s.   "件"从人从牛，本义是"分解分开"，说文中说"牛大物故可分"。表示事物或者作量词时，保留了强烈的"被分开因而独立"的暗示，如一件事一件衣服文件证件，如本例lot一件，sold in lots成件出售


group一组: 成员间有明确关系(unifying relationship、如明确的目的和分工)，cluster一簇: 原指生长在一起的，特别是大群体里的小群体，bunch一捆: 指自然相似均匀的，parcel一包: 含贬义不赞成，lot一件: 必须作为整体对待处理的


记忆方法: 1) 首字母GCBPL中的BG想成8个，PLC是警察police三个音节开头，8个警察<==一组

        2) 一组的意思是不同个体的集合mean a collection or assemblage of separate units.首字母GCBPL中的BG想成8个，PLC是警察police三个音节开头，8个警察<==一组     assemblage集合汇聚，来自词根SEMBL表示same, alike相似相同，等于assembly