如果我们计算气体混合过程中熵的变化，我们会发现这个量是正的。
If we calculate the change in entropy during gas mixing, we will find that this quantity is positive.
然而，有时，沿着已建立的通道的电子流会遇到正的电子流，正的电子流从地面开始形成新的路径。
Sometimes, however, a stream of electrons following an established channel is met by a positive stream making a new path up from the ground.
如果从D向外流动，流量就是正的。
这里是正的，因为是流向外部的。
Here it will be positive because it is going out of the region.
可以有正的偏移，或者负的偏移。
We can have a positive deviation, or we could have a negative deviation.
如果有一个正的偏移，那么就相反了。
斜率是多少，正的还是负的？
所以当曲面正方向如此时，结果是正的。
记住一个波会有，正的幅值和负的幅值。
Remember when we have waves we can have positive or a negative amplitude.
其值必须是正的非零整数。
显然如果快乐减痛苦是正的，即比零大。
Obviously, if the balance of pleasure over pain is positive, that's better than zero.
这种平均叫几何平均,只能用于正的数值
This is called the geometric average and it's used only for positive numbers.
既有正的，也有负的。
这是正的负的还是零。
这意味着斜率是正的。
我们知道结合能，总是负的，电离能总是正的。
We know that binding energy is always negative, ionization energy is always positive.
在这种情况，会有相对于理想情况的正的偏离。
And this is a case where there's a positive deviation from ideality.
但是，面积是依旧相同的，并且面积永远是正的。
但是，电子亲和能既可以是负的，也可以是正的。
Electron affinity, however, can be either negative or it can be positive.
净现值大于零说明项目对公司有正的净经济效益。
A net present value of greater than zero indicates that the project has positive net economic benefit to the company.
这是正的偏移。
看上去正的会多一点,因为这里的向量场要大一些。
Well, it looks like positive should win because here the vector field is much larger than over there.
速度的符号已经，由负变正了，可是加速度又还是正的。
It has changed from a minus sign to a plus sign because of this positive acceleration.
必须指定数组维数，并且它们必须为正的整型常量来表示。
The array dimensions must be specified and they must be positive constant integer expressions.
如果它是正的，那意味着从能量的角度说，混合是不利的。
If it's positive, that means energetically speaking, the mixture is unfavorable.
如果它是正的，那意味着从能量的角度说，混合是不利的。
If it's positive, that means energetically speaking, the mixture is unfavorable.
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