The capillary tube model in subcooling single-phase region and two-phase region was established, and the difference of mass flow rate is within 10% between the predicted and the measured values.

建立单相区和两相区毛细管模型，模型计算的毛细管质量流量与实验测量的质量流量差别小于10%。

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The results show that both the inter-phase velocity slip and temperature slip always exist in the whole two-phase region, but are not obvious.

结果显示：气液两相间的速度滑移和温度滑移在整个两相区一直存在，但在绝大部分区域内，这种非平衡性并不显著；

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In general, these curves are characterized by high irreducible water saturation, low remaining oil saturation with high relative permeability and wider two-phase region.

一般相对渗透率曲线具有束缚水饱和度较高、残余油饱和度较低以及残余油状态相对渗透率较高、两相流动区间较宽的特点；

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The WHO's "Phases of Pandemic Alert, " which has been in existence for five years, characterizes phase 5 as a human-to-human spread of the virus into at least two countries in one WHO region, signaling that a pandemic is imminent.

CNN: WHO raises pandemic alert to second-highest level