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So, let's say we're talking about the baseball, have a wavelength of the baseball that's on the order of the baseball.
克服质量的效应，比如说以棒球为例,要棒球的波长有它尺寸数量级的波长。
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So you can have good quality and less quality. It depends on your pocket.
所以你可以买质量好的和质量差的。这要看你口袋里有多少钱。
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We invoke Dalton's Law of molar proportions, we write it subject to conservation of mass.
我们援引了摩尔分数的道尔顿定律，要服从质量守恒定律。
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You have to look at, also, the quality of that information.
你也要注意，信息的质量。
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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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But he also realized that when they did hit something what they hit what unbelievably massive but also that that mass was concentrated So eventually, this is what we have come to call the nucleus of an atom.
碰到的一定是十分重的东西,而且那些质量,要聚集在非常非常小的空间内,这个就是我们称作,原子核的东西。
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We write it subject to conservation of mass.
要服从质量守恒定律。
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What I am going to do next day is go into the larger stoichiometry and understand the principles of mass balance and reactivity But before you go,hold it,I don't want you racing off.
下堂课我要做的是,讨论化学计量学，和,质量平衡很反应定律,但在下课之前，我不希望你们这么快走。
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I'm telling you, "What's the mass of the elephant?"
我要问你,"大象的质量是多少"
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