Charles Bolden, the head of the US space agency, NASA,and Lisa Jackson from the Environmental Protection Agency,or EPA, came to this Washington,DC middle school to encourage these youngsters to focus on math and science careers.

VOA: standard.2010.05.10

It's so important for us at EPA to build and continue to build our recognition and our mission with the youth.

对环境保护署来说,在年轻人心中建立并不断完善,对我们使命的认知是十分重要的。

普林斯顿公开课 - 领导能力简介课程节选