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Well,isn't that just the way science is? Just as we're getting some of the most exciting results, just as we're getting new concepts to test, we're reaching a point in the global environment where the economy just can't support everything.
VOA: standard.2010.07.15
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And at the end of the day the ultimate test is whether you're able to get done what you want to get done, or what you think the market demands from you.
每天最后的测试是看你是否,能够做成自己想做的，或者你认为市场会对你要求什么。
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and if you're a good test taker, and you know how to take the test
所以如果你善于考试，知道如何应试
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And it's just gathering together the multiplications while counting down the exponent. And you can see it when we get down to the end test here, we're going to pop out of there and we're going to return the answer.
这个方法就是通过乘法,来一个一个的减小指数,可以看到,最后面的结果测试，我们会在这里退出,然后返回答案。
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They're more like propositions, like speculations, that we're asked to test through empathic identification with, in this case, the poem's subject, Leda.
它们更像观点，像推测，而不是问题，叶芝问这些问题,以同情的口吻关注着，此诗的主题，丽达。
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So, for example, what we're going to do is we're going to test does 2 dominate 1?
比如说,我们现在来验证一下,策略2是否优于策略1
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Okay. Those of you who have your clickers let's pull them out, what I'd like you to do, if anybody doesn't have your clicker yet, please bring it to class. Please get one and bring it to class and we're only going to do one these exercise with the clickers today just as a test, but in subsequent classes we'll be using them quite a lot.
好,带了表决器的人把它拿出来,如果有人还没有表决器,我希望,你能弄一个然后把它带到课上,我们今天只要用表决器做一个测试,但之后的课中我们将多次使用到它
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You put this chromosomal DNA or this DNA that you're interested in, double stranded into a test tube.
你把这个染色体DNA,或者你感兴趣的双链的DNA,放进一个试管
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And what we did was he put two detection plates on either side of these cathode rays, and when he put a voltage difference between these two plates, he wanted to see if he could actually bend the rays and test if they're actually charged or not.
但没有实验证明这件事,这就是Thomson所做的，它在阴极射线旁边放两块探测板,他想通过看当他,在两板之间加上电压后,阴极射线是不是会。
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And you're feeling like you're in a light mood. You've just passed a test.
但你觉得你想看点轻松的，因为你刚刚通过一门考试。
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You know, if you're wandering through Harvard Square and you see an out-of-work Harvard grad, they're handing out examples of square roots, they'll give you an example and you can test it to see is the square root of 2, 1.41529 or whatever.
你知道，如果你从哈佛校园里穿过去,你看见了一个失业校友，正在派发平方根的示例，他们会给你一个例子,而你会检查2的平方根是1。41529或者别的什么。
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bug This is an easy bug to come up with. But imagine, if you don't do the test, you're going to get answers that don't make any sense.
这是一个容易发现的，但是想象下，如果你没做测试的话,你会得到没有意义的答案，实际上。
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That was the kind of thing you saw. Asserts said here are some conditions to test. If they're true, I'm going to let the rest of the code run.
这就是你看到的,断言是一些测试条件,如果他们为真。
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And yet get a valid test. Sometimes it can be timing. If you're running multiple processes.
有些时候当你运行多线程时,是因为时间的原因。
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Otherwise the test is always going to be true, we're going to go off here, but this would loop forever if I did that.
否则测试结果就会一直为真，我们需要离开这个测试，否则就会一直执行循环。
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We're checking the end test and incrementing, actually I was going to, I commented that out for a reason you'll see in a second, but I, normally I would keep this on, which would let me, at each step, see what it's doing. If I ran this, it would print out each step. Which is helping me make sure that it's incrementing the right way.
对不对？进行终结测试然后递增，实际上我要，因为某些你们,马上要明白的原因我把这里注释了，但是我通常会一直这么做，这样能让我看到每一步都做了什么，如果我运行这个程序，它会在每一步都,进行显示，这能帮助我让我确信程序是,在以正确的方式递增。
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All right. So we've got it now let's test it. So we're going to do here we're going to run compare methods.
很抱歉，那些坐在后面的同学,想往前面来的请自便，我们已经做好准备,让我们去试一下，我们接下来将要做的就是。
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It won't be long before we're using these same kind of devices to both record--to test what's going on-- and to act in the right way and response.
相信不久以后,这个装置就可以同时记录和反馈,大脑的信号,并做出相应的回应
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So when someone comes to me, and they're about to do a test, I ask them, what do you expect your program to do?
因此当很多人找到我想要，做一次实验的时候，我问他们你期待你，的程序返回什么结果呢？
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It's looking at the end test. It's looking at the kinds of conditions you're going to put in.
写代码的方法了，也就是通过讨论终结测试,通过讨论放入的条件。
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All right. Second question: or maybe a better way of saying this, and the general format you're likely to see here is, a test involving a variable name, which must be initialized outside of the loop, and which interior to the loop gets changed, so that the test is going to change.
好，第二个问题：,换种更好的方式来说吧，你们通常喜欢的,方式是，这个测试涉及到一个变量名字，变量在循环外已经被初始化，然后循环内部会改变这个变量的值，因此测试结果会改变。
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