随着铸膜液温度的上升，水通量先是明显下降，然后略有上升。膜对低分子物质的去除率先是增加，然后急剧下降。
As the temperature increases , the water flux first decreases evidently , then increases slightly and the clearance rates of low - molecular weight substances first increase , then decrease shaply.
随着工业化横扫世界而诞生的发达国家中, 生育率急剧下降, 这种现象首先发生在法国, 然后是英国, 后来遍及整个欧洲和美洲.当人们富裕时, 家庭规模变小;
As industrialisation swept through what is now the developed world, fertility fell sharply, first in France, then in Britain, then throughout Europe and America.
一名指挥官集团大幅飞到上方的天空，并举行了它仍然然后飞往急剧下降，射击的目标。
A commander of the group sharply flew up above the skies and held it still and then sharply flew down, shooting at the aims.
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