This is because the top of the troposphere is normally very cold, causing ascendingwater vapour to freeze into ice crystals that drift and fall, rather than continuing up into the stratosphere.
这是因为对流层的顶端通常极其寒冷，上升的水蒸汽凝结成飘落而下的冰晶，而没有继续上升进入平流层。
2
The water absorbency was descended with the ascending of the concentration of the external ion solution and the valence of the ion.
实验结果表明：随着外部盐溶液浓度的增大及盐离子的价态的升高，复合材料的吸液率下降；
3
During practical production, due to heterogeneity and control ascending of water cut latterly, reservoir pressure will be below bubble point pressure locally.