"There's a lot of technical terms in aviation and getting those translated properly and getting transmitted to them in a timely manner, especially when in flight, is a huge challenge.

VOA: standard.2009.12.13

None of these do we have vaccines for, and it's turned out that sexually transmitted diseases for a variety of reasons, we'll come back to later, are particularly difficult to develop vaccines for.

这些病我们都没有疫苗,已经证明,对于性传播疾病,有很多原因使得,我们稍后回来再讲,针对这类疾病的疫苗特别难做出来

耶鲁公开课 - 生物医学工程探索课程节选

and also intensify vaccination against all infectious agents, all viruses that are known to be strongly associated with the development of cancer. The government should increase its efforts to prevent illnesses with links to cancer, he says,such as hepatitis, a disease of the liver, and the human papillomavirus, which is transmitted during intercourse and is linked to cervical cancer.

VOA: standard.2010.06.16