Melvin has been an astronaut for 10 years. He says he's trying to be a role model to young African-Americans.

VOA: standard.2010.02.02

It's for-profit and the theory that we have in capitalist countries is that this is a good model.

这是盈利性公司,这是种滋生于资本主义国家的理论,也是个很好的模式

耶鲁公开课 - 金融市场课程节选

Milton's pushing here toward a fantasy of physical invulnerability imagining an alternative -- this is science fiction an alternative model of bodily configuration that would render impossible the all-too-easy quenching of the tender eyeballs.

弥尔顿在这幻想着人的身体可以刀枪不入,他在想象一个另类的-这只是科幻,他在想象一个另类的身体构造模型,这样脆弱的眼球,就不会轻易受到伤害。

耶鲁公开课 - 弥尔顿课程节选

That was Cartesian space. When I plot r as a distance out from the nucleus that is sort of our simple-minded planetary model. Now let's look at energy.

笛卡尔坐标系，当我用r表示,离原子核的距离时，那只是我们头脑中简单的,类似行星的模型，现在我们看一下能量问题。

麻省理工公开课 - 固态化学导论课程节选