利用两流体模型、小扰动原理和线性一阶齐次方程组有解的条件，得到了气液泡状流型下的压力波色散方程。
Using two-flow model, small perturbation theory and solvable conditions of one-order linear equations, a dispersion equation of pressure wave in horizontal air-liquid bubbly flow was proposed.
单腺泡腔小而狭窄，但小泡状腺的腔却大而膨满。
The lumen of the acinus is small and narrow, but that of the alveolus is large and distended.
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