学习外国的框架,零零星星和点点滴滴是不行的,还是要有一个高屋建瓴总揽全局的看法,所以就看看D3都有哪些方法. core:selection, transition, arrays, math, loading external resources, string formatting, csv formatting, localization(?), colors, Namesapce, Internal(?) scales:quantitative, ordinal svg:shapes, a