This form of matter is characterized by having a large positive pressure.

这种物质形式的特点是具有很大的正压。

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The use of vacuum suction and positive pressure fan to absorb and dry wind mosquitoes.

运用风扇负压吸力及正压风力来吸附和风干蚊子。

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Are all cargo tank atmospheres at positive pressure with an oxygen content of 8% or less by volume?

所有液货舱大气是否维持正压，且其含氧量以体积计低于8% ？

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He was acquitted in a 2006 rape trial, during which he admitted having unsafe sex with an HIV-positive woman, and he came under political pressure recently when it emerged that he fathered a child out of wedlock last year.

VOA: standard.2010.04.26

So if delta v is negative, in this case delta v is negative, OK, delta v is negative, pressure is a positive number, negative times negative is positive, work is greater than zero.

也就是当活塞,压缩气体的时候，做的功是正的，按照这一规定,我们需要在这里，加上一个负号，这是习惯规定。

麻省理工公开课 - 热力学与动力学课程节选

I'm pressing on the gas. So I expect that to be a positive number. The pressure is constant 0 p. The V goes from V1 to zero.

我们对气体加压,所以这应该是一个正数,压强是常数，p，V从V1变成。

麻省理工公开课 - 热力学与动力学课程节选

After two years my tracheostomy was closed but I still used -- and do to this day -- positive pressure but via a mouthpiece.

CNN: 'I lived in an iron lung for seven years'

The biggest hurdle was that the plastic had to be strong enough to hold the positive pressure of air pumped in, says Michael Metta, Sealed Air's technology chief.

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Positive pressure often keeps us in the job!

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