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If the atom is fixed mass, the electron is tiny, It must be the positives have all the mass.
如果是原子质量一定，电子很小，带正电荷的部分几乎占据了全部质量。
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And so it's a nicer place to be if you like having a good quality of life.
所以，如果你想有个高质量的生活，那里是个很好的居住地。
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So, if you want to attack urban air quality, this is probably moving in the wrong direction, OK?
所以如果你想攻击都市的空气质量，这可能是一个错误的方向，对吗？
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I mean that's obvious. The mass, if you double the amount of stuff the mass will double.
这是显然的，还有质量，如果你把系统中物质的,数量增加一倍，质量也会增加一倍。
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It's surprisingly easy to get a purple tie on eBay if you don't care much about quality."
如果你不是很在意质量的话,那么在易趣买条紫色领带是非常容易的"
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But if you put a less healthy fat in you get some improvement but less.
如果加入的是不那么健康的脂肪,那么对食物质量的改善就很有限
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If you knew this was one kilogram, then the acceleration of the elephant, which will be some tiny number, maybe 100th of what this guy did; the mass of the elephant is then 100 kilograms.
如果已知这个物体的质量为 1 千克,那大象的加速度,会是一个比较小的数,可能是物体加速度的 1 / 100,大象的质量就是 100 千克
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That is why this says atomic number, but for most intents and purposes we can say this could be atomic mass.
那就是为什么这里说原子序数，但如果没有意图和目的,我们就说是原子质量。
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If a photon which has no mass can behave as a particle, does it follow then an electron which has mass can behave as a wave? 1920.
如果一个没有质量的光子,能像粒子一样运动，那么它能像一个,没有质量的电子那样以波的形式运动吗。
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If a proton which has no mass can behave as a particle does it follow that an electron which has mass can behave as a wave?
如果一个没质量的光子能像粒子一样,具有质量的电子能否,表现得像波一样吗？
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If a photon, which has no mass, can behave as a particle --And we know this.
如果一个没有质量的光子，像粒子一样运动--，我们知道这个。
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He saw that if you take the atomic mass of chlorine, 2 add it to the atomic mass of iodine, divide by two, you get something that is really close to the atomic mass of bromine.
他看到，如果你将氯的原子质量，加上碘的原子质量，除以，得到的数将与,溴的原子质量很接近。
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If you add all these up then you end up 011 with 12.011 as the atomic mass.
如果你将这些都加起来，你会得出,原子质量是12。
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And so you can look, for example, at the Periodic Table And, if you look up the atomic mass of carbon, 011 you will see that carbon comes at 12.011 for carbon.
如你们所见，例如，在周期表中,如果你观察碳的原子质量，你会看到是12。
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And the fact is, food is healthier if it has less trans fat, but it depends on what fat's swapped out for it, because if you put a healthier fat in then it's--then you get a certain amount of improvement.
事实是,如果食物中反式脂肪的含量较低,确实会更健康,但这取决于被剔除的脂肪种类,因为如果加入较为健康的脂肪,食物的质量会获得一定程度的改善
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So, what's the conservation of mass if we divide by the atomic masses here?
那么质量守恒是什么呢？,如果我们在这儿按原子质量划分？
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We can be precise about how much bigger by saying, "If the acceleration of a body to a given force is ten times that of a one kilogram mass, then this mass is one-tenth of one kilogram."
我们能精确地知道质量能大多少,只需要说,"如果物体在给定力作用下的加速度,是一个 1 千克物体的加速度的 10 倍,那这个物体的质量就是 1 千克的十分之一"
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There's no reason why these two attributes had to be proportional, but they are proportional and they are equal by choice of units and you can ask, "Is this just an accident or is it part of a big picture?"
我们不知道这两个质量为何成比例,但它们确实成比例,而且如果选择合适的单位还会相等,你会问,"这种情况纯属偶然,还是这只是物理学大体系的冰山一角"
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