Based on the characteristics that in coal bed gas exist rich benzene and poor N-hexane, the authors propose two indicators as"Benzene lndex"(B)and"N-hexane lndex"(H)to distinguish the coal bed gas.

根据煤层气体具有富苯和贫正己烷的特征，提出了“苯指数”（B）和“正己烷指数”（H）两项判别煤层气的指标。

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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

We can go all the way down -- magnesium aluminum, all the way to this noble gas, 3s23p6 argon, which would be n e and then 3 s 2, 3 p 6.

我们可以继续，镁，铝,一直到惰性气体，氩它是Ne然后。

麻省理工公开课 - 化学原理课程节选

RT So it's delta u plus RT, we can say T1 is the n temperature we've used here, delta n of the gas.

所以它应该是ΔU加,我们可以在这里用T1，气体的Δ

麻省理工公开课 - 热力学与动力学课程节选

Tomorrow: gas and electric power, government.n Middlemen will thrive!

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