It's actually better to spend a certain amount of time just keeping your body in good condition

其实花一定时间保持身体的良好状态更好，

健康生活 - SpeakingMax英语口语达人

It's not a good thing if you're just looping and checking some condition, but never actually changing the state of the world.

这不是一个好事情，如果你只是循环,检查一些条件，但是永远不要改变世界上的国家。

哈佛公开课 - 计算机科学课程节选

The negative combination effects that I was talking about are certainly there, but on balance I think the human condition for must of us is a good one.

我所说的负面组合影响是肯定有的，但我认为人类的处境对大部分人来说是好的。

耶鲁公开课 - 死亡课程节选