No other type of tasks could compare with the project of human spaceflight engineering for after so many tests and experiments huge amount of work was still needed.

没有哪一个型号任务像载人航天工程这样，经过了这么多次试验，还要投入巨大的精力。

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And so they defined them, p after many experiments, the limit of this 0 delta T delta p and the limit of delta p goes to zero as the Joule-Thomson coefficient.

他们定义了这些量，以及它们的范围，ΔT比Δ,Δp的极限趋近于,叫做焦耳-汤姆逊系数。

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