mindmap root((稠密)) close applies to something made up of separate items that are or seem pressed together: paintings hung ~ together. dense implies compression of parts or elements so close as to be almost impenetrable: the ~ growth in a tropical rain forest. compact suggests a firm, neat union or effective consolidation of parts within a small compass: a ~, muscular body. （compact有3个意思 1、小型袖珍smaller than other things of the same kind，如a compact camera/car/design小型（袖珍）相机/小型车/袖珍设计 2、密实夯实something is pressed and harder and fills less space，可以作形容词或动词，如compact（ed） soil/dirt/snow/disc夯实的土灰雪/CD（光碟光盘） 3、身体短小结实short but solid and strong，如a compact body身体结实，如a compactly built hockey player身体结实的曲棍球运动员；另外compact可以单用，表示1、小型车a small car 2、女式化妆盒a small flat case containing makeup for a woman's face 3、正式协议a formal agreement） firm坚硬 consolidation使坚硬 （neat整齐整洁implies clearness from dirt, clutter, or admixture不脏不乱，如neat workmanship工整的工艺，还可表示娇小玲珑，如her neat figure她那娇小玲珑的身材） thick implies a concentrated condensed abundance of parts or units: a ~ head of hair.