Countries trade goods.
各国进行货物贸易。
Goods from farms and factories move all over the world.
来自农场和工厂的货物运输到世界各地。
This is because all countries trade and barter with each other to get things which they do not have.
这是因为所有国家都通过贸易和物物交换来获得他们没有的东西。
For example, the US specializes in growing wheat, but it does not have enough rubber.
例如，美国专门种植小麦，但它没有足够的橡胶。
Malaysia specializes in rubber, but it does not have enough wheat.
马来西亚专门生产橡胶，但没有足够的小麦。
Farmers in the US sell their wheat to the customers in Malaysia.
美国农民把小麦卖给马来西亚的客户。
Farmers in Malaysia sell their rubber to the customers in the US.
马来西亚的农民把他们的橡胶卖给美国的客户。
The two countries depend on each other for these goods.
这两个国家相互依赖这些货物。
Goods are shipped to ports in the countries where they are bought and sold by people.
货物被运到人们买卖的国家的港口。
Every year, the US spends millions of dollars trading for goods that it needs for its people to live happy and healthy lives.
每年，美国花费数百万美元购买其人民过上幸福健康生活所需的商品。
The same is true for other countries like Malaysia.
马来西亚等其他国家也是如此。