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 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。
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。
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。
NOAA scientists say Katrina's air pressure was very low.
VOA: special.2010.08.24
And this was a tube at low pressure.
这是一根低压条件下的试管。
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
应用推荐