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So in order to rotate a double bond, you have to actually break the pi bond, so essentially what you're doing is breaking the double bond.
为了能够旋转双键，你必须打破一个π键，本质上我们要做的就是打破双键。
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But what you have to do is you have to force yourself to forget that.
但你必须做的就是强迫自己忘记这点。
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So, part of what goes on when you learn, is you have to learn the language --the phonemes that your language has.
因此你在学习语言时要做的一件事情便是,你必须学习你所学语言的各种音位
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I need that sanity check saying at some point, you have to stop.
在一些地方需要做那样的合法性检查，告诉你必须停止操作。
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So you have a tradeoff almost it's almost like a Yin and a Yang.
所以你必须做一个抉择，就像阴阳之间的。
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But,in those days in high school-- but anyway, there we go--you'd go and do these things, and it would be a big sort of public spectacle,a spectacle.
不过那时候的高中--无论如何,就是那样--你必须去做这样的事情,那是个大型的公共活动
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The Christian virtue of humility, turning the other cheek, forgiveness of sins, must be rejected if you want to do good as opposed to just being good.
基督教所提倡的谦逊美德，把另一半脸让人打,的宽恕隐忍精神，对罪孽的原宥，都必须被抵制,如果你想做得好而不仅仅是表面上显得好。
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because it's so easy to get caught up in everything you have to do
因为你很容易被困于你必须做的事情，
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That's all you have to do, just sit down.
所有你必须做的是，就是坐下。
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You take all the risky assets ... and you analyze them first to get their-- you have to do a statistical analysis to get their expected returns, their variances, and their covariances.
你需要对所有的风险资产进行分析,首先要得到它们的-,你必须要做一个统计分析,算出它们的预期收益率，方差，和它们的协方差。
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And now here comes Eboo Patel telling me you don't have to add this to the already busy things I have to do.
现在Eboo，Patel又告诉我,你不必将此添加到,我必须做的已经很繁忙的事务中了。
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When you say "I must" what you mean is "I need to do something."
当你说 "I must"的时候，你是指“我必须得做某事。”
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But in order to do so, you have to use terms like "punishment" and "reward" and "reinforcement" in such a vague way that in the end you're not saying anything scientific.
但如果你要这样去做，你就必须将惩罚，奖励“,强化之类的术语概念模糊化,最终你所作出的解释便毫无科学性。
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And then you've got to be willing to do the things you must do.
然后你必须对要做的事情有兴趣。
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