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When you're driving in your car, there's a needle and the needle says 60; that's your velocity at this instant.
当你在开车时,有一根指针指着60,表示你这个时刻的速度
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And I just got a box lunch and there was a strange chocolate bar that I got.
我得到了一盒午餐，里面有一根很奇特的巧克力棒。
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Suppose I had a rope, that stretched from that into the room, all the way across-- to this end of the room.
假设我有一根绳子，从屋子的这一端，一直伸展到-,屋子的这一端。
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We only have the one bond so the actual HF molecule is polar, it has a net dipole.
但HF中只有一根键,所以分子也是极性的而甲烷中有一个网状偶极。
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If I strike you in a vulnerable place with a stick that has a bronze butt on it, it could well kill you.
如果我用一根有铜质尾部的棍子,刺你的软肋的话,很可能就是一击必杀
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There's different types of the root that you can get called the bitter and the sweet.
这些根有不同的类型,被称为苦的和甜的。
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Would she have imagined that the world famous whatever remembered how many strings were on the lyre on the bench beside the girl on the label of the cigar box he'd stated at in the tool shed at age ten while she, age eleven.
她能想象到这个世界闻名的诸如此类的人,竟然记得当她11岁，他10岁时在工具间里盯着看的,那雪茄盒上的标签上的姑娘身边,长椅上的竖琴有几根弦吗。
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But the mathematicians told Dirac, "You cannot ignore the negative energy solution because it tells you there's a second solution and you cannot throw them out."
但数学家们告诉狄拉克,你不能忽略负的能量,因为数学告诉我有两个根,你不能随便丢掉
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When you see a display like that, what you assume is there's a bar there, and what that means is there's something in the middle that you've never seen before.
当你看到这样的演示时,你已经假定那里有一根木杆,也就是说中间的部分,有你之前所未曾见过的物体
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And so, we have this cartoon. Again, we have an open beaker and a candle, and we're putting only heat into this beaker, T2 and the temperature goes from T1 to T2.
好的，我们要再次利用这幅图，这有一个敞开的烧杯和一根蜡烛，我们对烧杯加热，温度从T1上升到。
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It's loaded with phosphates which are negatively charged.
NA分子上有很多带负电荷的磷酸根
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They are going to accompany particles surely as every quadratic equation has two solutions.
他们是成对的粒子,正如每个二次方程都有两个根一样
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What makes it true that the person lecturing to you next Tuesday is Shelly Kagan, the very same person, what makes that true is that it's the very same soul.
那个下星期二给你讲课的,还是谢利·凯根,和现在是同一个人，所需要的条件是,有同一个灵魂。
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I got 3 kg and I have a rope.
有一个 3 千克的物体和一根绳子
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And it turns out the second solution, with negative energy, was when the theory is telling you, hey, there are particles and there are anti-particles, and the negative energy when properly interpreted will describe anti-particles.
结果,后来证明,第二个根,也就是能量为负的那个根,正是理论的关键,世界上既有粒子,也有反粒子,负能量就是用来解释反粒子的
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