All this wet air is pulled in by a high pressure area over the Indian Ocean and a low pressure area to the south.

VOA: special.2010.05.25

And what is inside the gas discharge tube is gas at low pressure.

气体放电管里,有处于低压下的气体。

麻省理工公开课 - 固态化学导论课程节选

And this was a tube at low pressure.

这是一根低压条件下的试管。

麻省理工公开课 - 固态化学导论课程节选

Many migraine sufferers say hot weather and low barometric pressure can act as triggers.

VOA: special.2009.03.18

Let's say we start from some V1 and p1 here, so high pressure, small volume and we end up with a high volume low pressure, under constant temperature condition.

例如我们要从压强比较高，体积比较小V1，p1出发,到达低压强，大体积的末态，过程中温度不变。

麻省理工公开课 - 热力学与动力学课程节选

NOAA scientists say Katrina's air pressure was very low.

VOA: special.2010.08.24

And so the photons hitting the wall actually put pressure on the wall, but the pressure is so low.

所以光子碰撞墙面,事实上在对墙加压，但只是压力很小。

麻省理工公开课 - 固态化学导论课程节选

The second is the low barometric air pressure.

VOA: special.2010.06.30

"They are not getting heart disease because of low blood pressure, they are not getting cancer because they have low risk factors for cancer,including smoking."

VOA: standard.2010.04.08

Low levels of vitamin D are even associated with high blood pressure.

VOA: standard.2010.05.28