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However, the thing to remember is, when you look at heats of reaction under those conditions it's all well and good.
相反，需要记住，当你需要知道反应中放出的热量时,这些量是很有用的。
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And it's a useful pattern when you want to express that your feelings have been hurt or that you're not liking something,
当你想表达你在情感上受到了伤害或者不喜欢某件事的时候，这是个很有用的句型。
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You can actually initialize multiple things at once by separating them with a comma, and this is sometimes helpful.
你可以一次性初始化很多东西,通过用逗号分开它们，这有时是有用的。
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But the kind of exercise we did last time is a useful exercise for those of you who are Econ majors.
但是我们上节课做的练习,对经济学专业的同学是非常有用的
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But it's a valuable thing. It says, in each case, I return some useful value from this procedure.
但是这就是变量，是在每个例子中，我从这个程序中返回了一些有用的值。
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Of course, that's not the useful application for it, it's more of a proof of principle, but it does show you that you can put it in for studies in any organisms.
当然，这不是很有用的应用，这仅仅是一个原理上的证明，但它告诉你你可以把它,放到研究任何生物体中。
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All I needed to do was to chip away the excess stone, to get rid of the marble that shouldn't have been there.
我只要凿去多余的石头，只留下有用的。
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And I thought it would be useful And I thought it would be useful to have to have opportunities to work with students opportunities to work with students about the issues about the issues outside the classroom outside the classroom that might either inform or impede that might either inform or impede their development their development as scholars.
我觉得，如果有机会与学生交流,我觉得一个有用的办法,会很有益,是创造机会和学生们一起处理,与他们讨论课外的问题,课外一些可能会影响或阻碍,这些问题可能促进或者阻碍,他们作为学者的发展的问题。
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In that way it would be useful to make a contrast between Aristotle and someone like Adam Smith the great author of The Wealth of Nations.
在这一方面，有用的对比将是,把亚里士多德,与像亚当？史密斯这样人物,放在天秤的两端。
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So, the Greeks are sopping up tremendously useful information and talent, and skills, and all sorts of things that help explain what's going to be coming.
希腊汲取了极其有用的,信息,才能和技术,而这对我们解释以后的历史启发良多
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If you want to remember your dream by the way keep your dreams--keep a dream diary, very useful, but everybody dreams three to four times a night.
如果你想记得自己梦见什么,那就写一本梦境日记，这是非常有用的，每个人平均一晚作三四次梦。
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Being a person is something that I,namely my body,can do for a while.
作为一个人，就是指身体是有用的。
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and sort of also useful as a skill... not just for my career but in general, so...
不仅是对我的职业，整体来看，它也是一项有用的技能，所以……
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But real useful things that let me have a deep appreciation for the side I wish I had done more.
但是真正有用的是让我有了正确的见解,这是我希望能够学到更多的。
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I think it's important for the children to really become involved in things that maybe important to them.
我认为孩子们,积极参与,对自己有用的事情很重要。
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So we now have a real usable criterion to help guide our understanding of whether things happen by themselves of their own accord or not.
所以我们找到了一个非常有用的判据,这个判据能够指导我们,弄明白变化是否,是自发发生的。
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I think these extra pictures sometimes they're helpful, sometimes they just make the book cost a lot more.
我想这些补充的图片有时是有用的,有时仅仅是把书价抬高了一点
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And you're telling them about what's useful in life, what you need to do in life.
你在告诉他们生活中什么是有用的，什么是你们必须做的。
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In other words, only if we really are sure that the historicist act of reading is effective and works, if I know the meaning of a text. Well, fine.
换言之，要是我们确定,阅读这个历史主义行为是有效的，有用的，如果我知道文本的意思，那么，很好。
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You got cholesterol, sodium, carbohydrate here, broken down as fiber and sugars, and that's very helpful information to know.
这里还有胆固醇,钠及碳水化合物含量,碳水化合物又被细分为膳食纤维和糖,这也是很有用的信息
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So this little video suggested there're a couple of heuristics that a computer or that a programmer could use to figure out what emails are important to someone like me.
正如上面这个短片的意思,对我们有所启发,去找到哪些是,对我们有用的邮件。
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Now you have a gap in your data and yet you still have some magnetic particles there that could be useful.
现在的数据中可能会有一些空白,但你仍然有一些,有用的磁性粒子。
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So the pain you're suffering now is actually instrumentally valuable, useful as a means, even though it's intrinsically bad.
所以你现在忍受的痛苦,是有利用价值的，作为手段是有用的，尽管痛苦本身是坏的。
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A psychology that will look at also things that work, that were not just study-- depression, anxiety, schizophrenia and neurosis.
需要着眼于有用的东西，不仅仅是研究-,抑郁，焦虑，精神分裂，神经症。
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Again, I apologize for going too fast but it's still a useful exercise I think, so have a look at it in the book.
再次,我为我讲得太快而道歉,但它仍然是个有用的练习,所以要好好看看课本中的内容
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Anyway let me try to say something that might be useful.
无论如何，我来阐释一些,可能有用的东西。
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So the exceptions are useful when you want to have the ability to say, I expect in general this kind of behavior, but I do know there are some other things that might happen and here's what I'd like to do in each one of those cases. But I do want to make sure that I don't let a value that I'm not expecting pass through.
所以当你希望有能力说,我希望一般是这样的行为,异常是很有用的,但是我明白还有一些其它的情况可能发生,我希望对每一种情况都这么做,但是我跟希望能保证,没有让一个预期之外的情况漏过去。
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And the reason I was able to do that and keep with what my original intentions were was to have a career that was the fulfilling, in terms of helping people and being engaged in science, is all of a sudden I realized, as chemists, we can think about better ways to build molecules that are important for making medications.
我能够这么做,并且能不和我原来的打算冲突,是因为我的职业很有意义，能帮助他人，又和科学相关,于是突然我意思到，作为一个化学家,我们可以思考出更好的办法,制造出在制药方面十分有用的分子。
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Alright, so it turns out there're two other useful types that you don't get for free out of the box.
我们还是回到这里，还有两种很有用的数据类型,这两种都不用担心内存不足。
应用推荐