But first,we talk to some Americans who have retired from their professional lives but still work hard to help others.

VOA: special.2010.07.16

Faculty here have three major professional activities.

这里的老师们有三个主要的专业活动。

麻省理工公开课 - 固态化学导论课程节选

or like, for, if I have like anything I want to learn in my professional life or whatever, it's really easily available.

或者，如果我在以后职业上有什么要学，也可以在这里很容易找到。

开放式的课程？ - SpeakingMax英语口语达人

All these sports are American inventions and have developed wide support in schools,amateur and professional leagues.

VOA: special.2010.06.02

Maybe they would, if they knew where I was going to go on so doggedly and do all these publications but being having the kind of mentality I have now that this student might claim that I have more to cover I've never been kicked out of the professional.

不过要是他们知道我会这么坚持不懈地做下去,还发表这么多书的话,当时的人或许会允许我，宽容我,但是如果那个学生带着我刚才的想法，的话,他或许会说,我还有很多要研究的呢,我一直都是专家。

麻省理工公开课 - 电影哲学课程节选

He said corporations,universities, non-profit organizations, and professional associations representing millions of scientists,engineers and teachers have embraced the call.

VOA: standard.2009.11.24

I don't really have like a professional opinion or a very well-informed opinion.

我的观点并不专业，也不是很成熟。

关于干细胞的研究 - SpeakingMax英语口语达人

El Paso County Sheriff's Department spokespersons say they have no information to collaborate the reports coming out of Mexico, but they have said that Redelfs was a well-respected professional.

VOA: standard.2010.04.01