HFT, which accounts for two-thirds to three-quarters of all Wall Street volume, seems to have led to smaller spreads (the gap between bid and offer prices).

高频交易，在所有华尔街交易量中比例约为三分之二到四分之三，似乎使得价差更小了(买入价格和卖出价格之间的缺口)。

youdao

As I said before, your price is so high that we find it difficult to make a bid. We hope you will take the initiative and bridge the gap.

我讲过，你方价格太高使我们很难还价，希望你方能主动弥合差距。

youdao

Danuta Hubner, the Polish government's representative at the convention, says her country regards the ability to set its own taxes as a necessary tool in its bid to close the economic gap with western Europe.

ECONOMIST: The European Union's convention

After London's successful bid, home values here narrowed the gap to 10% to 20% below the city average.

WSJ: London Developers Hope for Olympic-Size Boom

Yet as England stuttered to victory in their opening game against France, the first round of Four Nations fixtures seemed to serve only to underline the vast gap in quality that the Aussies will bid to ruthlessly underline at the DW Stadium in Wigan.

BBC: Closing the gap?