For the forming reservoir along Three Gorges, owing to current velocity of flow of Yangtze River becoming slower, the self-clean capacity of the water body would be decreased obviously.
三峡水库正在形成，由于库区段的长江流速明显减缓，导致水体自净能力大幅度降低。
Today's self-cleaning materials do not have long lifetimes and more importantly are often mediocre performers when it comes to their actual ability to self-clean.
当今的自洁式材料不但寿命短，其自我清洁能力表现也堪称平庸。
Today's self-cleaning materials do not have long lifetimes and more importantly are often mediocre performers when it comes to their actual ability to self-clean.
当今的自洁式材料不但寿命短，其自我清洁能力表现也堪称平庸。
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