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During this part, when you're doing a quarter of a circle, this is supposed to be a quarter of a circle.
在这部分,当你沿着四分之一圆运动,这就是个一个圆的四分之一
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Try to imagine-- can you do that or can you not do that?-- try to imagine a round square.
试着去想象,你可不可以这样,试着去想象一个圆的方形
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And this dimple is later forming a vesicle, a round ball, that goes on and forms the ear.
随后形成一个圆球状的泡囊，直至发育成耳朵。
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In fact, just because the world is round, you can already see if this is the Earth, to somebody that's the natural direction.
实际上,正由于地球是圆的,你们可以看到如果这是地球,对于某些人来说这才是惯常的方向
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Every time you see a square bracket, put a paren in. All right?
每次你看到一个方括弧，你就得在此添加一个圆括弧，明白了吗？
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And let's also make our egg perfectly symmetric and perfectly round.
而且我们要把蛋想成是，完全对称完全圆的。
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It was a great round shield about three feet across and it had--let me step out here so that I can show you. Can you hear me back there?
它是一块直径大概有三英尺的巨大圆盾,恩,它还有...我出来演示吧,这样你们就能看清楚,能听到我说话吗
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When he laughed, was witty, in a merry humor, one could scarce sees his eyes, and by and by, when he was serious and positive, he opened his eyes round.
当他笑时，他是睿智的，带有令人愉快的幽默，都看不见他的眼睛了，不一会儿，他变得严肃和积极了，便圆睁着眼睛。
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It was some kind of a child's game, like tiddlywinks.
是当时一种儿童游戏，类似挑圆片游戏。
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It's not perfectly round, but as much as possible.
不是完美的圆但要尽力。
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First I go over the physical posture you should have because when you're sitting like we usually sit on the round cushion or the floor, re free of contact with people usually both your knees and your butt are for the kneeling.
首先理顺应有的身体姿势,因为打坐时,像我们常会坐在圆坐垫,或地板上，你要确定自己身旁不要有人，you，make，sure，you‘,通常两膝和臀部都要注意,都要碰到地面。
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In other words, you don't have to be moving actually in a circle to have the acceleration.
也就是说,你不必真的在一个圆上运动以获得相应的加速度
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In order for a more or less round plate to remind me of roundness, Plato says, I have to have already met perfect roundness itself.
如果一个或多或少,有点圆的盘子能让我想到正圆,柏拉图认为,我必须已经见过完美的圆本身了
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I look at the plate on my kitchen table, it's not perfectly round, it's got imperfections; but suddenly I start thinking about circles, perfectly round objects.
我看着我餐桌上的盘子,它不是正圆的,它不完美,但是我马上就可以想到圆圈,正圆的东西
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Let's take a circle and just keep a quarter of the circle.
我们来画一个圆,只画四分之一圆即可
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The number three is not a physical object, perfect roundness is not a physical object, perfect goodness is not a physical object.
数字三不是一个物理实体,正圆不是一个物理实体,真正的善良不是一个物理实体
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So that a half circle, instead of calling it 180 degrees, And a quarter circle, instead of 90, It's good to know certain famous angles.
半圆,不说它是180°,四分之一圆,不叫90°,知道一些常用的角度很有必要
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In certain moods, I sort of feel I can just begin to imagine it.
在某些情况下,我感觉我能想象出圆的方形
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There are only things that are circular to a greater or lesser degree.
只存在相对的圆的东西
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How long does it take to go one round in this fashion?
质点绕圆一周需要多久
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We see something that's more or less round, and it reminds us of perfect circularity.
我们看到较圆的东西,我们会想到正圆
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In this world nothing is perfectly round, nothing is perfectly beautiful, nothing is perfectly just.
这个世界没有正圆,没有什么是绝对漂亮的,没有绝对的正义
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Look,we all believe the earth is round.
你看，我们都相信地球是圆的。
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Let's imagine it's a circular orbit.
想象一下,有个圆轨道
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Perfect roundness is not a physical object.
正圆也不是
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Or take being round.
或者以圆为例
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Okay. For those who have not seen a radian, it's just another way to measure angle with the understanding that a full circle, which we used to think is 360 degrees, So a radian is roughly 60 degrees.
我想告诉那些还不懂弧度制的同学,这是衡量角度的另一种方法,理解起来是这样的,对于一个整圆,也就是我们之前所说的360°,所以1弧度大约是60°
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So in hydrogen atom a, I'll depict that here where the nucleus is this dot, and then the circle is what I'm depicting as the wave function.
在氢原子A里，我在这里把原子核画成一个点，这圆就是波函数。
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So, we can say that a circle is a good approximation for a 1 s wave function.
所以我们说一个圆是,对1s波函数的好的近似。
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That means, it can only be rattling around in a circle of radius R.
也就是说它只能,限制在一个半径为 R 的圆上运动
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