On the one hand, living bacteria or parts of the biofilm compound keep on detaching again and again and thus present a microbiological source of contamination for other parts of the system.
一方面，活菌或生物膜化合物的一部分保持反复依附，因而成为系统中其它部分污染的微生物来源。
On the other hand, discard materials, which are produced by regenerative macromolecule, cause a serious contamination and threat the existence of the human beings.
另一方面，可再生利用的高分子材料的消耗所产生的废弃物也造成了严重的污染，威胁到人类的生存。
The new type sanitary cigarette packing method can avoid the contamination of the filter tip in cigarette caused by pollutant in hand and other pollutant source.
一种可以避免手部污染物、污染源由于吸烟而经香烟过滤嘴的传递进入人口腔的卷烟新型卫生包装。
The new type sanitary cigarette packing method can avoid the contamination of the filter tip in cigarette caused by pollutant in hand and other pollutant source.
一种可以避免手部污染物、污染源由于吸烟而经香烟过滤嘴的传递进入人口腔的卷烟新型卫生包装。
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