For example the square on hypotenuse of a right Angle triangle is equal to the sum of the squares of the other two sides.

例如，直角三角形斜边的平方，等于其它两边的平方和。

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The reader will recall this angle which formed a sort of cape on the street; it afforded shelter from the bullets, the grape-shot, and all eyes, and a few square feet of space.

我们记得这拐角处形成了一个伸向大街的海岬，它形成一个几尺见方的能挡住枪弹和霰弹、也能挡住人的视线的地方。

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Angle square: Use it for layout, cut-line marking or to check corners for squareness.

角尺：用它做版面设计，制作图例或检查矩形的角。

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When we look at this angular part, we see that it's always the square root of 1 over 4 pi, it doesn't matter what the angle is, it's not dependent on the angle.

当我们看这角向部分，可以看到它总是等于１除以４pai开根号，这和是什么角度没有关系，它和角度无关。

麻省理工公开课 - 化学原理课程节选

So I guess I should go back, and let me do this correctly this way. Again, I can look at test, test and I guess test now if I want to get the element out-- angle bracket or square bracket?

但是这不是我想要的对不对？,我认为我该回到这里，让我改正这个错误，好，那么我还是对元组,那么现在我想从test中取出元素来？

麻省理工公开课 - 计算机科学及编程导论课程节选