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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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and improve the quality of human life to the extent possible without using animal testing.
以及提高人类的生活质量。
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We wanted to quickly catch up and surpass everyone in terms of search quality for Chinese users.
希望能够通过该项目在为中国网民,提供搜索的质量，迅速赶超别人。
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He could divide all of that by the absolute value of the charge of the positive particle, all over the mass of the positive particle.
他可以把这整个,除以正电粒子的,电荷绝对值除以，正电粒子的质量。
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But gravity has a remarkable property that the pull of the Earth is itself proportional to the inertia of the object.
重力有一个显著特征,即地球的引力,与物体的质量成比例
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We have a table of the elements with properties varying periodically with atomic mass, so we compress all of that information and refer to it as the Periodic Table.
我们有一个元素表，其中的元素的特性,随着原子质量的改变而引起周期性的变化，所以我们将所有的信息精简,将它变成一个周期表。
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Now how it might be able to offer some quality of life improvement for these patients.
现在，我们如何帮助这些病人,提高他们的生活质量。
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It is a higher order psychological quality.
那是较高层级的精神质量。
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And one of the cases that I've talked about probably be the most controversial is where babies were born with severe problems that not gonna be compatible with what the parents and doctors judge to be a reasonable quality of life.
我所讲过的例子中,下面这个可能是最具争议的,有些婴儿一出生就有严重的生理问题,他们无法如他们的,父母和医生所愿,用有正常的生活质量。
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But fortunately,again,this is why positive psychology as a network of scholars applying themselves to these ideas and ideals. It's so important because today you'll see throughout the semester that there are so many more tools that we can apply to our lives, to go beyond the zero.
但幸运的是，这就是为什么要学习积极心理学,大量的学者致力于,研究这些观点，它意义非凡,因为今天你们会看到整个学期的概览,有很多方法可以让我们的生活质量，达到正值。
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but with, you know, less cost, and probably even quality is not that high.
却只要更少的成本，虽然产品的质量可能不怎么高。
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So, it's a trivial matter, by looking at what is the weight and how far does it drop, to say OK, how much work is done by the paddle wheel.
好，让我们看看重物的质量,以及它下落的距离，就知道桨轮做了多少功。
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And that's really neat to think about, because photons, of course, are massless particles, they have no mass, so it's neat to think about something that has no mass, but that actually does have a momentum.
而且那真的不容易想明白，因为光子，当然是无质量的粒子，它们没有质量，所以这个真的不容易想明白,一些物体没有质量，但是它们事实上确实有动量。
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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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We know now with the same spring, by this comparison, we will find all objects now can be attributed a mass.
我们现在知道利用相同的弹簧,采用这种比较的方法,就会发现,所有物体都有确定的质量
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We figured out the mass is so tiny that it shouldn't really deflect them very much.
电子的质量这么小,对它基本不会产生影响。
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Is this hierarchy, again, a genetic quality?
这种阶级制度是一种基因的质量吗？
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With some degree of confidence, I'm working with a reliable spring and then I will get the mass of the elephant.
这时我就对弹簧有信心了,我用的是一个可靠的弹簧,我能测出大象的质量
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But the acceleration it produces on the elephant and on the mass, are in an inverse ratio of their masses.
但这个力使大象和物体产生的加速度,与它们的质量成反比
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So, if you could make automobiles with a high magnesium content, you would reduce the mass, reduce the energy required, and thereby reduce the environmental impact.
所以，如果你能用含镁量,很高的材料来制造手机，你就能减轻手机的质量，减少制造所需能量，因此减轻了对环境的破坏。
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And we don't put the mass of the electrons because they are so light in comparison.
我们不能得到电子的质量,因为它们相较起来太轻了。
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0 And it has a mass of 9.11 times 10 to the minus 31 kilograms The charge compensation comes out of the nucleus with the proton and it is positive 1.6 times 10 to the minus 19 coulombs.
它的质量是9。11乘以0,到负31千克,电荷补偿来自于,有质子的原子核,它是+1。6*10^库伦。
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This also tells you that the mass of an object has nothing to do with gravitation.
这也表明,物体的质量与重力无关
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This is where most of the mass resides and the positive charge resides.
原子的质量和正电荷,大都集中在这里。
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He goes back and redoes the calculation, only in this case he says what I am going to do is I am going to redo the calculation for helium, but I am going to consider not just the mass of the electron but the reduced mass of the system.
他回去重新做了计算，仅在这种情况下他才会说说我将要,为氦重做计算，但我认为,不只是电子的质量,还有系统质量的减少量。
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Atoms of different elements have different weights and different chemical properties.
不同元素的原子的质量不同,化学特性也不相同。
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Square of the Planck constant times pi mass of the electron.
普朗克常量的平方,乘以π再乘电子的质量。
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Imagine then from now on, we can find the mass of any object, right?
假设从现在开始,我们就能测量任何物体的质量了,对吧
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that the negative particle travelled - it was deflected much, much further by those plates, what he could also assume and make the conclusion of is that the mass of that negative particle is actually larger or smaller?
因为他发现负电粒子,运动了很远,它被两块电板偏转了,非常非常远,所以他给出的结论是,负电粒子的质量,是比较大还是比较小？
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We want to know what is the mass of the elephant.
我们想要知道大象的质量
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