So it looks like not too many more than half of you got this correct, so make sure you can look at your periodic table and figure out how to think about ionization energy in terms of z effective, not just in terms of memorizing what that trend is.

看起来只有一半多一点的人,做对了，所以请大家务必做到能够通过观察周期表,并在考虑电离能时,从有效核电量的观点出发，而不是仅仅依靠记住这个规律。

麻省理工公开课 - 化学原理课程节选

Really? It looks like something is on your mind.

真的吗？你看起来有心事。

Is there any 实战 - SpeakingMax英语口语达人

It's a device called a deep brain stimulator, developed by a company called Medtronic, and it looks like a pacemaker that's implanted inside your body.

这个装置叫做深部脑刺激器,由美敦力公司研发,看上去像一个植入体内的起搏器

耶鲁公开课 - 生物医学工程探索课程节选