trading center的用法和樣例：
例句
- A village of southeast Louisiana on the Mississippi River west-northwest of New Orleans. It is a trade center in a truck farm and sugar cane area. Population, 16,112.
拉普拉斯，皮爾·西蒙·德1749－1827法國數學家和天文學家，以其關於太陽系起源和星雲假說的理論及對行星的引力和穩定性調查而著名 - Hong kong rate as one of the biggest trade center in the world.
香港是世界上最大的貿易中心之一。
