更重要的目标是利用互动式学习来发现减少的原因，并将其与我们今天面临的问题——自然灾害、环境问题和战争——进行比较。

The more important goal is using interactive learning to discover the cause of the decline and compare it to issues we face today—natural disasters, environmental problems, and war.

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今天我们来学习下球坐标，这是个很有意思的东西。

And, now we have to learn about spherical coordinates, which you will see are a lot of fun.

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今天我们来学习如何将两数相乘。

Today we are going to learn how to multiply two Numbers together.

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So the first thing we're going to do today is look at a different form of competition which is called Bertrand competition.

所以今天我们要做的第一件事,就是来学习一个不同形式的竞争,叫伯川德竞争

耶鲁公开课 - 博弈论课程节选