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So with the fact that I'm now just back at my prompt is a good thing so now GCC hello c if I type this command GCC hello.c, this is gonna run this program that Apple wrote in this case GCC or someone else wrote called GCC.
也就是说我们现在安全返回,说明一切正常,现在我输入这条命令：,这代表运行hello，c这个程序,是由“Apple“或其他人编写的，名为。
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Negative 1 plus 0 should add up to negative 1, if in fact, we're correct for the c n anion.
负一加上零应该等于负一，如果是这样，我们对于氰离子的结果就是正确的。
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If you want a real world example of this, think about the third Century B.C., someone can correct me afterwards.
现实世界也有这样的例子,大概在公元前三世纪,如果我说错了请大家来纠正
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You can tell if you're at all experienced with it very easily, if you go--let's say to the year 900 B.C.
而如果你对此比较熟悉的话很容易看出来,如果你去--假定去公元前九百年
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hello c So if I say hello.c which actually doesn't exist in here hi1 c but hi1.c does, you'll find it alphabetically.
如果没看到,那就是。
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If there's no heat flow between the b and c, then I can say all right, a and c were the same temperature.
如果在与之间没有热量流动，那么我就可以说，好吧与处于相同的温度。
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If you want to know what the number c is, you say, let's put time t=0.
比如,如果你想知道系数c代表的是什么,我们令时间t=0
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Generally, if it pays c dollars for every period, the present value is c/r.
推广开来,如果在每段时期内支付c美元,那么它的现值就是c/r
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So, if we think about the second case here where we have c n minus, now we're talking about a molecule with a net charge of negative 1.
那么，如果我们考虑的是第二个例子,也就是氰离子，那么现在我们讨论的是一个净电荷量为负一的分子。
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But if you think of the time span about 900 to 700 B.C., that is, when these changes are taking place.
但是如果你发现它发生在,大约公元前900年到700年之间时
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So we have 4 plus 5, but we're actually not done yet, because it's c n minus, so if we have minus, we actually have an extra electron in our molecule.
我们有四个加上五个，但是我们实际上还没做完，因为这是个负离子，所以如果我们有这个负号，那么我们的分子实际上还有一个额外的电子。
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And if you put this in the well-ventilated area, if you prepare this outside, the h c n gas will actually be released into the air, so you're safe, you can eat it later.
而如果你把它们放在通风良好的地方，在室外处理，那么氰化氢气体,将会被释放到空气中，这样你就安全了，过后就可以吃了。
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If you know you're not gonna output a full string %C but a single character, percent C will get that job done.
如果你不想输出一个完整的字符串,而是输出一个字母，就要用到。
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So it looks a lot less messy if we just draw our Lewis structure like this for h c n, where we have h bonded to c triple bonded to n, and then a lone pair on the nitrogen there.
这看起来整洁了不少,如果我们把氰化氢的路易斯结构画成这样的话，这样我们就有氢与碳之间的单键和碳与氮之间三键，然后还有一对孤对电子在氮这里。
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But to translate this now to a language C, you've got some curly braces, you got an if, some parentheses, but now we're just building on some of the syntax we introduced before.
如果把它转换成C语言，你又会看到一些大括号啊，if啊，圆括号啊等等，我们只是借助,之前学过的语法规则。
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Good, so if I plug q2 = 0 into here, this term disappears and I just get a - c over 2b.
把q2=0代入到算式中,这部分就没有了,只剩/2b
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So carbon has four valence electrons, so if we talk about c 2, again we're going to start filling in our molecular orbitals, and now we're going to have eight electrons to fill into our molecular orbitals.
碳有4个价电子，所以如果我们考虑C2的话，同样，我们开始填分子轨道，现在我们有8个电子,要填入分子轨道。
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So, if I compile and run copy2.c now let's see what happens.
所以，如果我编译并运行copy2。c，现在让我们看看发生什么。
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I claim this quantity is a - c over b such that if Firm 2 produces that much quantity, firm 1 will just produce nothing.
这个量是,/b,如果公司2生产这么多公司1就会停产
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But if I choose Alpha and my pair chooses Beta, I get an A and she gets a C.
要是我选α我对手选β,我得A 她得C
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If you put Beta and you're paired with Alpha, you'll get a C and your pair an A.
如果你选β你对手选α,你得C你对手得A
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If you pass a function in C, a value that it's not expecting bad things happen and bad things generally reduce to segfault.
如果你在C中传递一个函数，一个没有预料的情况将会出现,这个情况通常是段错误。
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In C and most programming languages, if you need greater than or equal to, use greater than and then right next to it with no space put equal to, and that conjures up the same idea.
在C和大部分的编程语言中，如果你需要表示大于等于,在“>“号后边加上一个“=“,中间不要空格，那使我们联想到同样的想法。
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And if I choose Beta and she chooses Alpha, then it's me who gets the C and it's her who gets the A.
如果我选β她选α,我得C而她得A
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