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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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It was very helpful for overcoming shyness and for just having a good time and being a little silly.
这个课在克服害羞方面很有用，它让人很开心，也让人有点幽默。
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But imagine I actually wanted to gather them together. I wanted to collect them, so I could do something with them.
把那些除数都显示出来,这很有用，但是请想想下我想要，把它们放在一块。
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Okay, not to dwell too much on math because you can very quickly bore someone in computer science by dwelling too much on math but it's useful even for logical constructs as we'll see with loops.
不要过于纠结于这些数学问题了,在计算机领域，你会很讨厌那些,在这上面钻牛角尖的人，但是对于那些,像循环这样的逻辑结构又是很有用的。
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And they're useful because, first of all, they're easy to depict, they're easy to draw relatively easy once we get all the rules down.
它很有用是因为，首先，它很容易描述，它很容易画出来,一旦我们确定了所有的规则以后就比较容易。
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So, you find another crop that will grow there that can be useful; that's the picture.
也许你换另一种作物就能长得很好,这样也许会有用,这幅图景就是这样的
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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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These signaling proteins play important roles in determining how many cells differentiate down particular pathways and they turn out also to be very useful for treating diseases of those pathways.
这些信号蛋白在决定特定分化路径上,有多少细胞在分化时起着重要作用,且在治疗疾病方面也很有用,同样也是利用这些机制
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But that turns out to be useful.
但是结果很有用。
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And this is actually a useful thing to know.
这是一个很有用的理论，大家都应该记住。
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So it's useful to have the average velocity.
平均速度还是很有用的
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I actually want to change that around, if I might, and play with that, because that's a really useful image for us: "takes the mask off literature and reminds us how we come to be sympathetic or Richard Wright how we come to think something." Think back to Richard Wright, who wants words to disappear, to be completely transparent and to leave you just with your response.
实际上，我想要改变一点，可能的话，玩弄一下，因为那对我们是很有用的画面：,把文学的面具卸下,我们是如何同情,或思考事物的，回想一下，他希望文字消失，而变成透明的，只剩下你们的回应。
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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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It seems that computer technology is vital in making visual effects. What if we didn't have it?
好像计算机技术对视觉特效很有用。要是没有这个我们会怎么样？
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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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It's just very hard. So I think that that's helped a lot.
这很难，所以我觉得这个方法很有用。
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So if you learn how to look at films and if you are a real film buff, even bad movies will be useful, because they will give you things to develop your sensitivity toward the nature of film itself.
所以如果你们可以学会如何看电影,如果你们真的对电影了如指掌，即使是不好的电影也会很有用，因为,它会培养你对,电影本质的敏感程度。
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And I also saw how law could be useful in the career that I wanted to do
而且我也发现法律在我想从事的职业中很有用，
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It will be useful and I think it also will show you that you are very smart.
这个句型非常有用，使用它也会让你显得很聪明。
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Look in the local newspaper, see where they're advertising because it's always really helpful.
看看当地报纸吧，看看他们在为哪里做广告，因为它一直都很有用。
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But I think, yeah, practicing in the country where this language exists is very useful.
但是我想，是的，在这个说英语的国家练习英语很有用。
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So it's a useful way of not quite knowing in advance what you want to put in a string, but being able to create strings, phrases, sentences, dynamically.
这是一个很有用的方法，如果你之前不是很了解,在句子中要加入什么，但是这个方法可以,动态地创建字符串，短语，句子。
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I could do this, by the way, by running the code and putting print statements in various places as well, but the hand simulation is valuable, so let me just start it.
做了正确的更新，顺便说一句,我可以通过在很多地方,放置print声明来达到这个目的,但是手工模拟也很有用。
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But it is a very handy way of thinking about, not just how to program, but how to break problems down into nice sized chunks.
但是它确实是一种很方便的思考方式，不仅仅限于编程序,在将程序分解为小部分时也很有用。
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We are talking about a society,therefore, the anthropologists have come up with, which I think is a useful distinction.
因此,我们所说的这个社会是一个...,人类学家已经提出了一种区分的方法,我认为很有用
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Sometimes a blunt cut is useful if you want to sort of grow a sticky end of your choice on it.
这时候钝切口很有用,尤其在你想获得选定的粘性末端的时候
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So, dimensional analysis is extremely valuable in thermodynamics, and here is an example of it.
因此，量纲分析,在热力学力很有用，这里就是一个例子。
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It's useful to have the average acceleration, which you can find by taking similar differences of velocities.
平均加速度也是很有用的,你可以用类似方法,取速度的变化量求出来
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And this is useful because if you're actually writing a program that's interactive or that you want to change overtime much like you would a game, hopefully, the game is not going to have the bad guys, for instance, always standing in the same place or the rocks or whatever it is falling from the sky in the same place 'cause it would very quickly become a very tedious game.
这是很有用的，因为如果,写一个交互的程序或者,希望每次游戏都不一样，我们希望，游戏中的坏人物，别老是站在同一个地方或者同一块石头上,或者从天空中同样的位置落下,因为这立刻会使游戏变得乏味。
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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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