采用PVDF材料，在目前超滤膜所用制膜材料中，PVDF化学稳定性最好，耐污染，强度高，是综合性能最好的膜材料。
In the current UF membrane materials, PVDF is the best membrane material with chemical stability, anti-pollution, high strength, and best overall performance.
白洋淀纤毛虫主要由耐有机污染的种群组成，说明白洋淀主要受有机污染。
Ciliates in Baiyangdian lake were composed mainly by tolerant organic pollution community, it shows that Baiyangdian lake is polluted mainly by organic materials.
该色带具有不脱墨、字迹清晰、耐擦性好，质优价廉等特征，并具有不污染环境和具有较高的应用价值。
The ink has the feature of no environmental pollution and low cost, and has high application value.
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