Machiavelli speaks of the prince, while Hobbes speaks of the sovereign, that is a kind of impersonal or in Hobbes' language, artificial power created out of a contract.

马基雅维利探讨君主，而霍布斯则探讨主权，这算是不受个人感情影响的，在霍布斯的说法里，君主的权力是由契约产生的。

耶鲁公开课 - 政治哲学导论课程节选

Imagine how much power it takes to drive an artificial heart, so you've got to have a battery or some way of generating power continuously to operate that and that makes it difficult to think about implantable and so that's a really good example of Biomedical Engineering.

驱动人工心脏所需要的能量是难以想像的,所以需要电池或者是某种持续发电装置,来给人工心脏提供能量,这就增加了人工心脏的植入难度,这是很好的生物医学工程的例子

耶鲁公开课 - 生物医学工程探索课程节选