版本：2.0.0-beta.18
- https://cdn.bootcdn.net/ajax/libs/brain.js/2.0.0-beta.18/browser.js
- https://cdn.bootcdn.net/ajax/libs/brain.js/2.0.0-beta.18/browser.min.js
- https://cdn.bootcdn.net/ajax/libs/brain.js/2.0.0-beta.18/index.js
- https://cdn.bootcdn.net/ajax/libs/brain.js/2.0.0-beta.18/index.min.js