Notice in this example the marginal cost is increasing.

注意，在这个例子中，边一直在增加。

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

事实证明，供给曲线实上就是边曲线。

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

如果雇佣工人带来边收益大于边，那么恭喜！

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

这种专业化减少每个披萨边。

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

此时，最后一个披萨边是巨大。

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

由于创建虚拟项目边为零，因此对开发人员来说是非常有利可图。

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

如果下一个披萨边是9美元，那么你也应该生。

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

但如果下一个批萨边是12美元，你就不应该生。

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

最终，总有一座公园边效益会小于边，于是他们停止建造公园。

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，因为最后一个单位边效益等于这个单位边。

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

下一千瓦时边为零。

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单位电力（即边）进行投标。

Marginal cost... Aha, I was hoping you'd say it.

边...啊哈，我希望你能这么说。

So Russia can still export at 60, its above marginal cost.

因此，俄罗斯仍能以60美元价格出口，这一价格高于其边。

And the marginal cost of growth is zero and you go bananas.

而增长边为零，你就会发疯。

The marginal cost is relatively low.

边相对较低。

It's where marginal revenue equals marginal cost, right?

就是边收益等于边，对吗？

The short-period supply price, on the other hand, is equal to the marginal prime cost.

另一方面，短期供应价格等于边主要。

For the short-period supply price is the sum of the marginal factor cost and the marginal user cost.

对于短期供应价格是边要素和边用户之和。

As long as the standby passenger pays more than the marginal cost, selling the ticket is profitable.

只要备用乘客支付超过边，出售机票是有利可图。