According to the passage, what are characterized by their less centralized trades negotiated between dealers?
The Vessel can be()in lawful trades between ports,anchorages or places where it is customary for similar size vessels to lie safely aground.
你是一个brokerage公司的数据库开发者。这个数据库包括一张名为Trades的表。如下是用于创建该表的脚本: 你要确保在trades表里可任意的进行插入和查询操作。你要怎么做?()