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(xué)家和天文學(xué)家，以其關(guān)于太陽(yáng)系起源和星云假說(shuō)的理論及對行星的引力和穩定性調查而著(zhù)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。
