am,in fact,a person,but that won't always be true of me.

事实上，我作为一个人，但不总是我。

耶鲁公开课 - 死亡课程节选

He's also a very likeable person, you know, he's always telling jokes, always smiling,

他也非常讨人喜欢，总会讲笑话，嘴上一直挂着微笑，

有印象的教授 - SpeakingMax英语口语达人

Everyone knows from calculus that if you're trying to find a function about which you know only the derivative, you can always add a constant to one person's answer without changing anything.

学过微积分的人都知道,如果你想根据已知的导数,求出其原函数,你总是可以给某人的答案,随便加一个常数,且不影响结果

耶鲁公开课 - 基础物理课程节选

The personal aid isn't a National Security offical but a person always knows what the president's schedule is, has his briefing book, his speech, his man, whatever the president needs to just keep functioning.

私人助理不是国家安全部官员,但是他必须知道,总统的行程如何，拿着他的简报，他的发言，他的人手安排，一切总统维持正常工作,所需要的东西。

普林斯顿公开课 - 国际座谈会课程节选