These included questions from Rwandan students about subjects like drug use, H.I.V./AIDS and girls in school who get pregnant.
VOA: special.2009.11.12
D-A-V-I-D I'm not hardcoding in D-A-V-I-D anymore but I can still use a variable.
我不再把名字写死为,而是用一个变量来代替。
v du/dV under constant temperature. du/dT v under constant volume. You use the Joule expansion to find these quantities.
像偏u偏v,恒温下的偏u偏,恒容下的偏u偏,你们知道怎么运用焦耳定律。
So v of t, v is the limit, and we use the symbol dx/dt for velocity.
点的速度等于一个极限,我们用符号dx/dt表示速度
Well, turns out that with arrays, not to make this too trippy too soon, but Arg V bracket something is a string, you can also use square bracket notation to go to a specific letter in a string, because little teaser a string is just an array.
好的,结果用那个数组,不要使这个很快引起幻觉,但是Argv什么的,是一个字符串,你也可以用方括号定位到,字符串中的一个特定的字母,因为一个字符串只是一个数组。
v We don't know what it is yet. In order to change this from a p to a V, you have to use the chain rule. So let's use the chain rule.
为了把这里的p变成,我们需要利用链式法则,好,让我们使用链式法则。
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