Cross-border trade happens only when there is surplus. In that sense, all exports are the result of overcapacity — This is a basic principle in trade. The US is the world’s largest exporter of agricultural produce, natural gas, and many other products. Why doesn’t it ever apply the same criterion for overcapacity to itself? What a double standard! 只有當存在順差時，跨境貿易才會發生。從這個意義上說，所有的出口都是產能過剩的結果 – 這是貿易的一個基本原則。美國是世界上最大的農產品、天然氣和許多其他產品的出口國。為什麼它自己也不採用同樣的產能過剩標準呢？多麼雙重標準啊.