| ## zh-CN | |
| 参照 Bootstrap 的 [响应式设计](http://getbootstrap.com/css/#grid-media-queries)，预设六个响应尺寸：`xs` `sm` `md` `lg` `xl` `xxl`。 | |
| ## en-US | |
| Referring to the Bootstrap [responsive design](http://getbootstrap.com/css/#grid-media-queries), here preset six dimensions: `xs` `sm` `md` `lg` `xl` `xxl`. | |