Nike has about 90% market share in basketball shoes, but it's not a natural monopoly.

耐克在篮球鞋市场占有90%的份额，但它并不是自然垄断。

Now, of course there are debated over when the government should interfere and which markets justify natural monopolies.

当然，人们还在争论政府应该什么时候干预，以及哪些市场可以证明自然垄断的正当性。

High barriers to entry make it unlikely that a rival will emerge, so FIFA has a natural monopoly over international football.

高门槛准入导致很难产生竞争对手，于是国际足联垄断了国际足球运动。

It's as close you can get to a natural monopoly on the internet.

这与互联网上的自然垄断非常接近。