预蒸发 meaning in Chinese

pre evaporation

2 . the effects of pre - evaporation time on the structure and properties of pes membranes by two - step formation
东华大学硕士论文2 .研究了铸膜液的预蒸发时间对二次成形聚醚矾膜结构与性能的影响。
As the pre - evaporation time increases , the water flux first decreases then increase , at the 23rd second it reaches the minimum value ; the clearance rates of urea and creatintine increase first then decrease and increase a little at last
随着预蒸发时间的延长，水通量先减小后增大，在235时有一最小值;肌肝和尿素去除率均是先升高而后降低然后再稍为升高的趋势。
As the pre - evaporation time increases , the holes on the membrane surface becomes smaller and less , dense layer is becoming more evident with large and deep holes in supporting layer ; and porosity increases as well - as average hole diameter decreases
随着预蒸发时间的延长，膜表面的孔变小变少，膜的致密层越来越明显，支撑层有大而深的孔结构出现。随着预蒸发时间的延长，膜的孔隙率上升，平均孔径下降。