A drop in oxygen pressure can cause headaches in certain individuals.

氧分压的下降会使一部分人头痛。

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The vapour cone effect is caused by pressure differences around the aircraft. A sudden drop in pressure associated with high speed allows water vapour, which is normally invisible, to condense as fog.

蒸汽锥效应是由于战斗机周围的压力差所导致的，高速飞行时压力的陡然降低会使不可见的水蒸气凝结成雾气。

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Lastly, the measurements of the cigarette filter ventilation and pressure drop were taken using a KC3 combined dilution/pressure drop instrument (Borgwaldt-KC, Richmond, Virginia, USA).

最后，采用结合稀释/压力差仪器（美国弗吉尼亚时士满Borgwaldt-KC）的KC3进行香烟过滤器和压力差的测量。

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They discovered a drop in pressure in the fuel cells that supplied electricity.

VOA: special.2009.06.24

We're going to drop the pressure, the volume is going to go up.

我们会降低压强，体积就会变大。

麻省理工公开课 - 热力学与动力学课程节选

Typhoons cause atmospheric pressure to drop.

VOA: special.2009.07.07

Birds, which have more rigid and robust lungs, do not undergo the same trauma from a sudden drop in pressure.

BBC: Wind farms put pressure on bats

If pressure bleeds off there is clearly a problem with the pressure integrity of the shoe, However, industry practice dictates that a positive test, that is no pressure drop, is not diagnostic, simply because the reservoir pressure is sufficient to retain the pressure being applied.

WSJ: The Oil Disaster Is About Human, Not System, Failure

At its worst, the pressure drop corresponded to a leak five times the normal rate, but by late last week it was only twice the normal rate.

MSN: Crew finds ��culprit�� in space station leak