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But it has a property that when you add it to anything, you get the same vector.
但它有个性质,就是用它加任何矢量,你得到的都还是原矢量
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When you add it to any number, it doesn't make a difference.
任何数加上它都没有变化
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- If someone-- you're-- one of you're predecessor didn't already submit it, do follow the directions at top left which says, add calendar so that we can augment the data set even further.
如果-,除非前任代表没有提交相应信息，一定要遵循左上方的用法说明，添加日历,这样就可以进一步增大数据集。
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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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You know when you add 2 polar forms, you add the radii together, you don't add the angles together, you need to do it in Cartesian form.
表示形式的不同理解，返回给你了不同的值，这也就带来了一系列的问题，第二个问题是。
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It gets more dissonant, . the more notes that you add there.
加的音越多，和弦就越不和谐。
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if at any point you've got something you want to ask about or some two bits you want to add, raise your hand, wiggle it around, make sure I see you.
任何时刻如果你有想问的东西,或者你想要加上什么东西，请举手，摇晃起来，确保我能看见。
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According to Modigliani and Miller, if you add taxes to their debt irrelevance proposition, it means that companies will want to borrow a lot and the real advice they would be giving to Bill Gates is: what's the matter with you? Why aren't you borrowing money?
根据MM理论,如果在负债不相关理论中加入税负因素,就意味着公司愿意大量负债,他们会给比尔·盖茨一个建议,你脑子有问题吗,为什么不借钱
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But then having found one answer, you can add to it anything that gets killed by the act of taking derivatives.
一旦你算出了一个答案,你就可以往式子里加入任何,在求完导后消失的项
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Now, it's not obvious but it is true that you cannot add to this anymore.
虽然不是很明显,但你确实无法再往后面加什么东西了
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Because any velocity I ascribe to a particle or an object, you will add a certain constant to it by the law of composition of velocity.
因为我描述的任何一个质点或者物体的速度,你都要根据速度叠加法则,给它加上某个常数
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It doesn't matter the sequence in which you add the two vectors.
在做两个矢量的加法时无所谓相加的顺序
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And, one thing I'd like to add to it, and that is, and I told this to my recitation sections that when you do these quizzes, in spite of the fact that it might be trivial in some cases, make sure you carry the units through.
而我要在这基础上再加一条，我在我的背诵课上也讲过,当你考试时，尽管单位不重要，但我希望你能注意它们。
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When you add this whole thing up, -411kJ/mol it gives you a net of minus 411 kilojoules per mole or about 4 eV per ion pair.
当你全部加上时，得到净能量,或者是4eV每个离子对。
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You can square this guy and add it to the square of this guy and you will find, using the magic of trigonometry, that this is true.
你可以把这两个式子平方相加,再用一下三角函数的性质,你会发现这是正确的
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It is true mathematically, you can add two numbers, but you've got to ask yourself,"What am I doing as a physicist when I add these two numbers?"
在数学上它是正确的,你可以引入这两个常数,但是你需要问问自己,当我引入这两个常数时,这么做有什么物理意义
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it's clear that you want to add a vector that looks like that, because then you go from the start of this to the finish of that, you end up at the same point and you get this invisible 0 vector.
显然应该给它加上这样一个矢量,因为从这个矢量的起点指向那个矢量的终点,最终指向的是同一个点,你就得到这个不可见的零矢量
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You can add something else to the answer without invalidating it, and that is anything with one power of t in it, because if you take one derivative it'll survive, but if you take two derivatives, it'll get wiped out.
你可以往答案后面加上其它东西,而且不影响结果,也就是任何t的一次项,因为你求一次导数之后它还在,但如果你求两次导数,这一项就不存在了
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