It is products with no marginal cost of replication.

那就是复制成本为零的品。

Suppliers bid according to how much it would cost to provide an extra unit of power, known as its marginal cost.

供应商根据提供额外力的成本（即边际成本）进行投标。

But if the marginal cost of the next pizza is 12 dollars, you shouldn't make it.

但如果下一个批萨的边际成本是12美元，你就不应该生它了。

Since the marginal cost of creating virtual items is zero, they are very profitable for developers.

由于创建虚拟项目的边际成本为零，因此对开发人员来说是非常有利可图的。

If the marginal cost of next pizza is 9 dollars then you should produce that pizza too.

如果下一个披萨的边际成本是9美元，那么你也应该生它。

Eventually, the marginal benefit of another park will be less than the marginal cost, so they stop building parks.

最终，总有一座公园的边际效益会小于边际成本，于是他们停止建造公园。

If hiring that worker brings in more marginal revenue than marginal cost, then, congratulations!

如果雇佣工人带来的边际收益大于边际成本，那么恭喜！

Now, the marginal cost of that last pizza is huge.

此时，最后一个披萨的边际成本是巨大的。

It turns out that supply curves are really just marginal cost curves.

事实证明，供给曲线实际上就是边际成本曲线。

Now, this specialization decreases the the marginal cost of each pizza.

这种专业减少了每个披萨的边际成本。

Equilibrium is efficient because the marginal benefit of the last unit consumed equals the marginal cost of that unit.

均衡点最有效率，因为最后一个的边际效益等于这个的边际成本。

Notice in this example the marginal cost is increasing.

注意，在这个例子中，边际成本一直在增加。

I think you should almost assume that the marginal cost is zero.

我认为你几乎可以假定边际成本为零。

The marginal cost for the next kilowatt-hour is zero.

下一个千瓦时的边际成本为零。

And the thing underpinning it all is the software itself has zero marginal costs.

其背后的关键在于，软件本身具有零边际成本的特性。

It is manifest in the microeconomic model of perfect competition, which revolves around the idea that in market equilibrium, the price of any product is equal to both its average and its marginal costs of production.

这一观点在完全竞争的微观经济模型中得到体现，该模型围绕一个核心理念：在市场均衡状态下，任何品的价格都等于其平均生成本和边际生成本。

And Uber, for all its history and for all of its future, will have high marginal costs because a person, who is made of meat, has to be moved around in a huge metal thing.

而优步，无论其历史还是未来，都将面临高昂的边际成本，因为需要将一个由肉构成的人移动到一个巨大的金属物体中。

Perhaps the most important element in marginal cost which is likely to change in a different proportion from the wage-unit, and also to fluctuate within much wider limits, is marginal user cost.

也许边际成本中最重要的因素是边际用户成本，它可能会以与工资不同的比例变，也可能在更宽的范围内波动。

And that, we think, will improve the entire industry, because the marginal cost of compute is the risk, as shown by that graph and basically every part of this conversation.

我们认为，这将提升整个行业的水平，因为如那张图表及本次对话的各个方面所示，计算的边际成本就是风险所在。

So basically, as knowledge started getting distributed more and more widely, as the marginal cost of distribution went to zero, there's basically an infinite amount of knowledge out there.

所以基本上， 随着知识开始被越来越广泛地传播，传播的边际成本趋近于零，实际上就有了无限的知识量。