加硬防水膜在镜片表面封上一层非常致密平滑的聚合物，使得镜片表面灰尘、水及油污清洁异常方便。
Hydrophobic coatings seal lens surfaces with an ultra-smooth polymer, making it easy to clean the eyeglass lenses from dirt, water or oily contamination can simply be wiped off.
而滴加草酸的铁膜表面形成的颗粒具有近菱形截面。
The surface of the former is full of round granule while the latter is in the shape of rhomb.
通过向进水中投加不同浓度的阴离子表面活性剂（LAS），研究了一体式平板膜生物反应器对高浓度LAS的去除性能。
The performance of a plate membrane bioreactor for treating high concentration of anionic surfactant (LAS) was investigated in laboratory scale by changing the content of LAS in influent.
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