在这种古老的交易形式的过程中，不存在现金的易手。

In this ancient form of trade, no money changes hands.

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由于得天独厚的受欢迎商品交易形式，期货交易所享有很高的入市门槛。

Blessed with a popular product, the futures exchanges also enjoy high barriers to entry.

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第三，讽刺地是，最有争议的计算机驱动交易形式恰恰是可提高市场效率的形式。

The third, most controversial form of computer-driven trading is ironically the one that should make markets more efficient.

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Normally, when you have a dealer, the dealer has a-- when we talk in terms of price the dealer has an ask, which is higher than the bid.

一般来讲,当你和中间商交易的时候,如果以价格形式谈论,中间商的买入价,会比卖出价高

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