trading cast的用法和樣例：
例句
- By thronging together, they create large, liquid markets that drive down trading costs and reduce risks by allowing large deals to be handled.
通過鄰近的辦公地點，創造了巨大的流動市場，從而降低了交易成本，減少了大宗交易的風險。 - Alternative trading networks are most common in America, where they have helped to push the cost of trading relentlessly lower.
在美國，交易所以外的交易網路已經如此普通，無情的將交易成本壓得更低。
