In approach number one, you simply lay out the various positions, pro and con, and the professor strives to remain neutral; sort of not tip his hand about what he holds.

方法一，你们简单的列出不同的观点，正面和反面，老师争取保持中立;,不表明他支持哪边。

耶鲁公开课 - 死亡课程节选

Not only should one seek peace but we have an obligation, he says, to lay down our arms, to lay down our right to all things on the condition that others around us are prepared to do so as well.

我们不仅是应该寻求和平,还有义务来放下自己的武器，在周围的人准备同样作的情况之下,放弃我们对一切事物的权利。

耶鲁公开课 - 政治哲学导论课程节选

Then, you make an arrow corresponding to B and lay it on the end of this one.

再画一个表示 B 的箭头,把 B 放在 A 的终点

耶鲁公开课 - 基础物理课程节选