其采用的协议是 Apache License v2.0,可以商用,不需特别申请授权。
/*!
* Bootstrap v2.1.1
*
* Copyright 2012 Twitter, Inc
* Licensed under the Apache License v2.0
*
http://www.apache.org/licenses/LICENSE-2.0 *
* Designed and built with all the love in the world @twitter by @mdo and @fat.
*/