网上有很多，如：

来源: 于 2016-07-19 08:35:07 [旧帖] [给我悄悄话] 本文已被阅读：次

http://www.usnews.com/news/articles/2015/01/27/more-students-earning-degrees-in-stem-fields-report-showshttp://www.usnews.com/news/articles/2015/01/27/more-students-earning-degrees-in-stem-fields-report-shows