It's always upward sloping, but it may, after awhile, you get close to satiation where you've got enough.

斜率永远是正的,但是也有可能,你拿的钱够多,效用将不再上升

耶鲁公开课 - 金融市场课程节选

If we take this simple straightforward view and say you're dead when you're not P-functioning anymore, then you were dead,on and off and on and off,last night.

如果我们就用那直接简单的观点,说你就是死了，不再有人格功能了，昨晚你就不断地死亡和复活中度过。

耶鲁公开课 - 死亡课程节选

If we go to the oxygen atom, now we're talking about starting with 6 in terms of valence electrons again, but instead of 2, you can see we have 6 lone pair electrons around the oxygen minus 1/2 of 2, so we have minus 1 is our formal charge.

如果我们分析氧原子的话，现在我们讨论的还是,从六个价电子开始，但孤对电子不再是两个了，你会看到氧周围,有六个孤对电子，再减去二的一半，因此我们有一个负的形式电荷。

麻省理工公开课 - 化学原理课程节选