Edward Damiano, a biomedical engineer at Boston University in Massachusetts, knows firsthand the challenge of managing juvenile diabetes.

VOA: standard.2010.04.15

So seeing, firsthand, how patient reaction works and what it's like to be an actual doctor,

所以你瞧，第一手经验，病人反应怎么样，真正当医生什么样，

未来的医生 - SpeakingMax英语口语达人

Former President Bill Clinton knows firsthand about the political consequences of failing to enact health care reform.

VOA: standard.2009.09.02

Allegations of voting irregularities are widespread and international monitors acknowledge they were not able to observe firsthand what took place in many provinces because of poor security.

VOA: standard.2009.08.22

(...) He says he thinks that it is good that the Obama administration is seeking to get firsthand knowledge of the effects that the war against terrorism is causing the U.S.ally.

VOA: standard.2009.10.30