The gas would have the dual effect of choking air-breathing animals and preventing sunlight from reaching Earth's surface.

这些有毒气体不仅会使动物造成了窒息，而且对照射到地球表面的阳光产生了严重阻挡。

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A mechanical model of choking flow in the expansion valve was presented, which is based on the expansion wave and gas dynamics discontinuities theories.

通过亚稳态液体闪蒸形成的蒸发波以及气体动力学非连续理论，建立了电子膨胀阀壅塞机理模型。

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