Now, that medium of exchange means we're not stuck in the barter system.

这种交换媒介意味着我们没有困在物物交换制中。

The point is what economists consider money is anything that's accepted as a medium of exchange.

问题是，经济学家认为货币是被公认作为交换媒介的任何东西。

It's not an effective medium of exchange.

它不是一种有效的交换媒介。

Nobody does their balance sheet in bitcoin terms, and they're not a medium of exchange.

没有人用比特币来计算他们的资产负债表， 它们不是一种交易媒介。

So then you can ask in developing economies, is it functioning as a medium of exchange?

那么你可以问在发展中经济体中， 它是否起到了交换媒介的作用？

And when you do want to cash in, money gives you a medium of exchange— a convenient way of swapping what you have for something you want.

当你确实想兑现时，金钱为你提供了一种交换媒介——一种将你拥有的东西换成你想要的东西的便捷方式。