版本：4.2.7
- https://cdn.bootcdn.net/ajax/libs/dc/4.2.7/dc.js
- https://cdn.bootcdn.net/ajax/libs/dc/4.2.7/dc.min.js
- https://cdn.bootcdn.net/ajax/libs/dc/4.2.7/style/dc.css
- https://cdn.bootcdn.net/ajax/libs/dc/4.2.7/style/dc.min.css
A multi-dimensional charting library built to work natively with crossfilter and rendered using d3.js