The reason why literacy is required of everyone is because we don't live to 200.

为何每个人都需要文化素养？,因为我们活不到200岁,我们出于对外界的好奇。

麻省理工公开课 - 媒体、教育、市场课程节选

Everybody needs grain; bread is the stuff of life as you have been rightly told.

每个人都需要谷物,就如你所知的,民以食为天

耶鲁公开课 - 古希腊历史简介课程节选

But just make sure everyone- do I need to explain what's going on here?

为了确保每个人都能理解,需要我描述一下大致情况吗

耶鲁公开课 - 博弈论课程节选

We'll think about it in section, how you don't need to vaccinate everybody, but you just need to vaccinate a critical number in order to stop the disease from progressing through a community.

我们在讨论会上讲这个,为什么不需要给每个人都接种,但你只需要让接种人数达到一个临界值,就能阻止这个疾病在社会中传播

耶鲁公开课 - 生物医学工程探索课程节选

If you have profit sharing in a firm or profit sharing in homework assignment, or any joint projects, you have to worry about too little effort being contributed because there's an externality.

如果你是一个公司的股东,或者和别人一起做作业及其他合作项目,你们需要注意到因为外部性,实际上每个人都付出了较少的努力

耶鲁公开课 - 博弈论课程节选