It also differentiates between positive zero (+ 0) and negative zero (-0).
它还区分正0(+ 0)和负0 (- 0)。
Obviously, if the balance of pleasure over pain is positive, that's better than zero.
显然如果快乐减痛苦是正的,即比零大。
dT/dp is mu JT. So for a real gas like air, this is a positive number. It's not zero.
所以对于像空气这样的真实气体,这是一个正数,不等于零。
And when we're talking about the amplitude of the wave, we're talking about the deviation from that average level. So, if we define the average level as zero, you can have either a positive amplitude or a negative amplitude.
当我们讨论一个波的振幅时,我们说的是偏离平均位置的量,如果我们把平均位置,定义为零的话,那幅值不是,正的就是负的,有时候人们在。
In other words, T surrounding dS has to be greater than zero, and of course temperature is always positive.
换句话说这就意味着,环境温度T乘以dS必须大于零,当然环境温度T是正的。
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