一个挥之不去的问题阻碍了许多新企业的脚步，即“我为什么需要它？”或者，也许更能说明问题的是，“为什么你需要知道这个？”

The persistent question of "Why do I need that?"—or, perhaps more tellingly, "Why do you need to know that?"—dogs the steps of many new ventures.

youdao

一个挥之不去的问题是“我为什么需要它？”——或者，也许更能说明问题的是，“为什么你需要知道这个？”——-阻碍了许多踏入新的冒险的脚步。

The persistent question of "Why do I need that?"—or, perhaps more tellingly, "Why do you need to know that?" —dogs the steps of many new ventures.

youdao

为什么你需要学会分享生活？

Why do you need to learn to share life?

youdao

It's very exciting, but if you think you know everything you don't need to learn, you don't belong to us. I always need to learn.

这很令人兴奋，但如果你认为,你什么知道，你不需要学习了，那么请你退出百度，因为人总是在学习。

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选

So the moral here, again, is whenever you're doing an implementation of a simulation, you do need to have some underlying theory about the model.

所以这里的寓意还是,不管你在做什么东西的仿真程序，你需要有一个,模型的底层程序。

麻省理工公开课 - 计算机科学及编程导论课程节选

Well, first it is important because it's-- you need to track what the population is eating and also individual intake.

说它重要首先是因为,你需要探寻人们都吃什么,还有个体摄入量

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选