"We have all seen that,first hand, when Americans responded to the tsunami or to Katrina, or the earthquake in Pakistan.

VOA: standard.2010.01.16

For those of you don't know what that is it's simply an instrument that counts radioactive particles in the air, and MIT now that you're at MIT, you'll all have a chance to see one first hand if you're ever in any of the labs, especially in the chemistry or bio labs.

不知道它是什么,它就是一个简单的,计算在空气中放射粒子数目的仪器,你们现在来了，如果你们在实验室里工作的话,尤其是化学和生物实验室，你们有很多机会亲手用到它。

麻省理工公开课 - 化学原理课程节选

Of course,being the son of a famous Hollywood film star allowed him to go backstage and meet some of these musicians first hand, particularly at The Monterey Jazz Festival and the Hollywood Bowl in California.

VOA: standard.2010.04.16