• Bigger livestock herds are putting greater pressure on land resources and disrupting some ecosystems and the animals generate significant amounts of water and air pollution, including methane, a climate-changing greenhouse gas.

    VOA: standard.2010.02.22

  • dT/dp is mu JT. So for a real gas like air, this is a positive number. It's not zero.

    所以对于像空气这样的真实气体,这是一个正数,不等于零。

    麻省理工公开课 - 热力学与动力学课程节选

  • And if you put this in the well-ventilated area, if you prepare this outside, the h c n gas will actually be released into the air, so you're safe, you can eat it later.

    而如果你把它们放在通风良好的地方,在室外处理,那么氰化氢气体,将会被释放到空气中,这样你就安全了,过后就可以吃了。

    麻省理工公开课 - 化学原理课程节选

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