It's just minus the sum of all these things, because of course these are just defined as the work done by the environment to the system.

等于负的这些东西的和，因为它们的定义是,环境对系统所做的功。

麻省理工公开课 - 热力学与动力学课程节选

So that means if we add up all of the formal charges within the molecule, what we would expect to see is that they sum up to give a net charge of negative 1.

那么这就意味着如果我们把这个分子中,所有的形式电荷加起来，我们应该会看到它们加起来,之后得到的净电荷量为负一。

麻省理工公开课 - 化学原理课程节选

I should be able delta Hs to take the sum of all of those delta Hs.

因此，我们能够,把这些。

麻省理工公开课 - 固态化学导论课程节选

And against that we would then have to subtract the sum total of the negative experiences, all the failures and deceptions or what have you.

与此相对，我们必须,减掉消极经历的总和，所有的失败和受到的欺骗。

耶鲁公开课 - 死亡课程节选

First of all, happiness is a positive sum game-- it's not a zero sum game.

首先，快乐是正和游戏-,不是零和游戏。

哈佛公开课 - 幸福课课程节选

If the product is just the sum or multiple of a sum of the inputs, there wouldn't be much of a point working in a team at all.

如果总收益只是投入的和或者倍数,那这样合作也没什么意思了

耶鲁公开课 - 博弈论课程节选

So here, I'm going to have delta H, is just the sum for all the products of delta heat of formation right? Here I'm going to put together all the products. So this is a positive heat of formation.

所以这里△H就是所有生成物的,生成热的和,对吧？这里,我要把元素组合成所有这些,生成物，所以这里是正的生成热。

麻省理工公开课 - 热力学与动力学课程节选

We are going to take the sum of the delta H's delta H or the deltas H for all of these little reactions.

我们将会把这些H加和,也就是所有这些过程的。

麻省理工公开课 - 固态化学导论课程节选