That potential difference is generated by the movement of ions, principally sodium and potassium across the membrane.

电势差是由离子运动造成的,特别是钠和钾的跨膜运动

耶鲁公开课 - 生物医学工程探索课程节选

They deal with, principally, state and local governments who are issuing bonds to raise money for their activities, like New Haven, for example, or any other state or local government.

他们主要与,州和当地政府打交道,这些政府机构通过发行债券筹资,例如纽黑文市,或者其他的州,或者其他的当地政府

耶鲁公开课 - 金融市场课程节选

In the course of this inquiry, he concluded that not only Hegel and Marx were important in that particular genealogy, but this went back to Plato as well, Plato principally.

他在研究之后总结说，不只黑格尔及马克斯,要对此负责，并一路溯源至柏拉图，而且主要是后者。

耶鲁公开课 - 政治哲学导论课程节选

Musical notation is a particularly Western phenomenon and when you stop and think about it only we in the West, and by West what I mean is the United States and Canada and Western Europe and Russia, parts of South America, only we use musical notation and we use it principally for our high art music.

音乐记谱法是西方所特有的,你可以停下好好想想,只有我们这些土生土长的西方人,所谓西方,我指的是美国,加拿大,还有西欧和俄罗斯,包括一部分南美国家,只有我们使用音乐记谱法,并且我们把音乐记谱法应用于高雅音乐

耶鲁公开课 - 聆听音乐课程节选