There are prominent differences between traditional surface science underUHV conditions and catalysis in the real world, focusing on the so-called"materials gap"and "pressure gap".

在真空表面科学研究与实际催化反应体系之间存在着显著的差异，具体表现在所谓的“物质鸿沟”和“压力鸿沟”上面。

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To maximize energy output, the tapered towers funnel wind between them, creating a negative pressure zone behind the buildings that draws more air through the gap.

为最大限度发电，在两塔间形成了漏斗形的聚风口，使得在大厦后面形成一个负压区，有利于通过豁口吸入更多空气。

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The tax case against Cadbury comes as India's government, under pressure to bridge a budget gap, is seeking billions of dollars from multinational companies it says haven't properly valued transactions with their Indian subsidiaries.

WSJ: India Says Cadbury Used Phantom Factory to Avoid Taxes

As long as a big output gap remains, downward pressure on inflation will persist even if growth perks up.

ECONOMIST: Give growth a chance

With the demand from the backlight market nearing saturation and the general lighting market yet to take off, growth in demand has been slow, resulting in a huge demand-supply gap that has put pressure on the average LED selling price.

FORBES: Cree's Earnings: Looking For Signs Of A Sustained Recovery