Take the difference of the two velocities and divide by the difference of the two times, and you've got the acceleration.
求出速度的差值,除以时间的差值,这样就能得到加速度
In the real world, no one's going to measure it instantaneously, but we can make the difference as small as we like.
在现实生活中,没人能一瞬间测出来,但我们可以使差值越来越小
That is this rewritten in a much more compact notation because you have the value of this.
这就使你在重写的时候能有一个更紧凑的标记,因为你已经有了这个值的概念。
I'd like to give them a name, so I can refer to them in other places.
我需要给他们一个名字,这样我就能在其他一些地方引用这些值了。
We need to have conditions internally that are relatively constant in terms of temperature, and pH, and chemical composition in order for us to thrive.
我们需要体内的环境参数保持相对稳定,这些环境参数包括,温度,pH值,以及化学组成,这样人才能茁壮成长
And that's why the Gibbs free energy is just so enormously important.
吉布斯自由能G在平衡态取得最小值,吉布斯自由能是最重要的。
So I can solve out for X.
因此我能解出X的值
And, the values that it takes can be broken into three groups.
它所代表的值,能被分为三部分。
And we can go through and calculate the value of this quantity in parenthesis. And, when we do so, we get the value 2.18 times 10 to the minus 18 joules.
我们能进行计算这些值,如果我们这样做,我们能算出是,2。18,乘以10,的负18焦耳。
Let's bind z eh let's bind z to the-- f if I could type it would help-- say, f of 3. OK?
让我们给z赋值--如果我能打字就好了-,比方说?
And built up the list corresponding to the three items that the user entered.
建立起对应的数组来,因此这里,我能得到的唯一中间值就是res了。
The format is the same. I'm going to ask for some input, and then I am going to use that procedure to check, is this the right type of value. And I'm trying to use that to do the coercion if you like. Same thing if it works, I'm going to skip that, if it not, it's going to throw the exception.
格式是一样的,我需要一些输入,然后我要用一个过程来检查,是否是正确的值,然后你就可以做强制转换了,如果能运行,那是一样的,我打算跳过这段,如果不正确,那就会抛出一个异常。
I said, use the name mystring to be bound to or have the value of Eric, so I can refer to it anywhere else that I want to use it.
用mystring这个名字,来绑定Eric这个值,这样我就能,在任何想用这个值的地方使用它了。
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