But using commodity money means you have to make commodity money, which is solved by production technologies–like smelting.

但是使用商品货币意味着你必须制造商品货币，它是通过冶炼等生产技术来解决的。

But commodity money has a problem: Get too much, and it's a pain to carry around.

如果它们太多了，随身携带是很痛苦的。

But when we think of early money, we tend to think of commodity money—physical objects that are useful, like rice grains, or pretty, like gold coins.

但是当我们想到早期货币时，我们往往会想到商品货币——有用的实物，比如米粒，或者漂亮的，比如金币。