We looked at pressure change before, actually, in discussing the third law, the fact that the entropy goes to zero as the absolute temperature goes to zero for a pure,perfect crystal.
在讨论热力学第三定律的时候,我们讨论过压强变化,即对于纯净的完美晶体,随着温度下降到绝对零度熵也变成零。
And what that corresponds to, if you recall, is the idea that in a perfect crystal at zero degrees Kelvin then you have no disorder at all.
如果你们能回忆起来的的话,这就意味着,绝对零度下的完美晶体,一点无序状态也没有。
We see somebody who's fairly decent morally, and it reminds us of perfect justice or perfect virtue.
我们看到某人品德不错,就会想到绝对的公正与完美的品德
As we'll see in section today, a vaccine does not have to be totally perfect in order to prevent transmission of a disease, because when a disease enters a community its spread from one person to another.
有如我们今天看到的,疫苗不一定非要,绝对完美地阻止疾病的传播,因为当疾病侵入一个社区后,会在人群间传播
And of course, the hedonist will also hasten to point out that just because we can't do this perfectly or infallibly, that doesn't mean we can't make educated guesses, right?
当然享乐主义者也会急于指出,不能因为无法完美绝对地做到,就意味着不能做出有根据的猜想?
Last time we reach the third law which is telling us that we can't quite get to zero degrees Kelvin .but that as the temperature approaches zero degrees Kelvin, the absolute entropy of a pure substance in perfect crystalline form is zero.
上次课我们得到了热力学第三定律,这个定律告诉我们我们无法,达到0K的温度,但是在我们接近绝对零度的过程中,以完美晶体形式存在的纯物质的绝对熵,也趋向于零。
应用推荐