ab-absence n.(ab否定-sence拉丁词汇存在to be)absent a.absorb vt.(ab离开sorb吸收。to swallow up,to suck拉丁语)absorbed a.be absorbed in doing.absorption n.吸收融合of(nutrition)，专心in doing sth.ab-,abs-1.从，来自from2.离开 away from3.表否定 notabs-词根首字母为c,t前缀扩展为abs-abstract a./n.vt.提炼（abs离开tract拉，抽出）abstraction n.抽象化，提炼ad-adapt (apt适应，倾向于同fit)be apt to do/tend to do admit (mit送，放出send,词源同mission使团使命。允许进入，承认，同意)adult (ul同ol,词源old,t为过去分词后缀。)adolescent 青少年(adol,ad,ol,同上，esce起始动词后缀，即成长中的，ent名词后缀)adventure (vent来come，ure名词后缀，通常词根以t结
