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Leda feels the beating of the swan's heart, and that heart is "strange" to her, that simple, powerful word.
丽达感受到天鹅的心跳，而那心跳对她来说很陌生，陌生，是个简单给力的词。
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The semiotician's answer to this is it never could have happened simply as an act of agency, as an act of will.
符号学者这样解释,这不是一己之力的结果。
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And you see where the most electronegative elements are, and fluorine is the most electronegative of the active elements.
你找一下电子力最大的元素在哪，氟是活泼元素中,电子力最大的。
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I draw a graph here of the amount by which I pull the spring versus the force it exerts.
我在这里画个图,纵轴是弹簧的拉伸量,横轴是力的大小
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There are many kinds of work. There's electrical work, take the motor, you plug it into the wall, electricity makes the fan go around, that's electrical work. There's magnetic work.
我们复习一下大一,学过的功的概念：,物体在力的作用下，运动了一段距离。
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So, remember when we talk about Coulomb force, what's holding the nucleus and the electron together, there's 2 things we need to think about.
还记得我们在讨论库仑力的时候，提到是什么将原子核与电子束缚在一起时，有两点需要考虑。
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So this idea of receptivity is a part of that Do you want to say anything else?
所以这种关于接受力的观念也是学习的一部分,你还想说别的么？
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And the driving of the id, the forces of the id and the forces of the superego, are unconscious in that we cannot access them.
本我的驱力，本我和超我的力量，都存在于我们无法觉察的无意识之中。
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The stuff that people tend to add sometimes is to keep drawing the 10 Newtons that's acting on that.
有人经常凭空添加的力,总是把这个 10 牛的力硬加在这个物体上
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The force, as this weight drops is constant, mgh and so the work is just going to be m g h, h where this is h.
当重物掉落时候的力是恒定的，因此做功就是，这段长度是。
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We know what an electric field is, it's just a space through which a Coulomb force operates.
我们知道，电场不过,是库仑力的作用空间。
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And, if you ever get confused, the way to remember these is that you know energy is the integral of a force moving through a distance.
如果你感到很困惑的话，可以这么来记,能量是在沿力的方向进行路径积分。
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Newton is not going to come and tell you what force the spring will exert when it's pulled by some amount.
牛顿不会过来告诉你,弹簧被拉伸一定量时会产生多大的力
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Gravity is one force that acts on a body without the source of the force actually touching it.
引力是一种受力物体收到了力的作用,但却没有接触施力物体的力
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By the way, when I say there's 10 Newtons acting this way, you might say, "What about gravity? What about the table?"
顺便提一下我说有 10 牛的作用力,你也许会问,"那重力呢,桌子对它的力呢"
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So, massless bodies will always have, like a massless rope, equal and opposite forces on the two ends.
所以无质量的物体,比如这个绳子,两边所受的力永远都相等
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We want to know how much force it exerts when I pull it by a certain amount.
我们想知道当我们将弹簧拉伸一定量时,它能产生多大的力
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That's the huge force that we're talking about in terms of making a bond stable, but there are also repulsive forces, so you can imagine we're going to have electron-electron repulsion between the two electrons if we're bringing them closer together.
正是这个非常强的力,使得我们所讨论的这个键能够稳定存在，但是其中还有排斥力存在，大家可以想象一下,我们会有电子与电子之间的排斥力,如果让它们离得更近。
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It's the 10 Newtons acting on it, because I know the 10 Newton is pushing me and I'm going to feel it even if I'm here.
他们认为这 10 牛的力作用在了物体上,因为这个力在推着物体前进,物体能感觉到的,即使没有直接接触
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Do not forget the existing forces and do not make up your own forces.
不要忘记已存在的力,不要自己乱加力
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Infinity is the force when we're thinking about it and our brains, negative infinity is when we actually plug it into the equation here, and the reason is the convention that the negative sign is just telling us the direction that the force is coming together instead of pushing apart.
说力有多大时，我们想到的,是无穷大，而方程解出来的,是负无穷，这是因为习惯上,我们用负号表示力的方向,是相互吸引而不是相互排斥的,所以我们可以用库仑定律。
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Whenever there is a force, it can be traced back to a tangible material cause, which is all the time a force of contact, with the exception of gravity.
如果有作用力,那它一定能找到一个明确的实体施力物体,也就是无论何时物体受的都是接触力,引力除外
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Remember, the wall is pulling to the left with the same force.
记住这个墙也要向左用相同的力拉它
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The force is not known, but it's the same force.
力的大小未知,但与前一个力大小相等
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We don't know what the force of the spring is.
我们不知道弹簧的力多大
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Then, I bring the elephant and I pull the spring by the same amount and I find the acceleration of the elephant and the denominator is obviously the mass of the elephant.
然后我再找来大象,用相同的力去拉弹簧,大象就具有了加速度,很明显,分母就是大象的质量
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We didn't have to know its magnitude.
我们无需知道这个力的大小
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You cannot say to me, "Take a force, due to a spring, and see what force it applies and divide by the acceleration and get the mass, " because we haven't defined force, either.
你不能说,"给弹簧施加一个力,看看它能提供多大的力,然后除以加速度,得到质量",因为我们还没给力下一个定义
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We don't know what force it exerts.
我们不知道它会产生多大的力
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They add to that the 10 Newtons.
他们加上了这个 10 牛的力
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