Researchers also carried out an experiment to test if signs of disorder that were heard had the same effect as signs that were seen.

VOA: special.2009.03.03

Ask yourself, what sorts of activities would you engage in ? if you knew that those activities carried with them the risk of dying?

问问你自己，你会参与什么样的活动,如果你知道这些活动带有死亡的风险？

耶鲁公开课 - 死亡课程节选

Because if it was a disease that was carried by both humans and squirrels, for example, then in order to get rid of it on the planet, you'd have to vaccinate not only all the people but all the squirrels, right?

因为假如人和松鼠都能携带,某种疾病的话,想要把这种疾病从地球上清除,不仅要给所有人接种疫苗,还要给所有松鼠接种疫苗

耶鲁公开课 - 生物医学工程探索课程节选

So if you have a mass killing of an ethno-religious group, carried out by a government in order to eliminate those people from their homeland, or to destroy their political and cultural potential - that is,by the conventional definition and most scholarly definitions, a genocide."

VOA: standard.2010.03.18

Ibrahim,a civil society activist for the Somali Institute for Research and Development, says that if al-Shabab carried out the attack for which he says there is little doubt the group's denial could be due to the shocking nature of Thursday's death toll.

VOA: standard.2009.12.05