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Backflow / communication

Backflow

Pollution and waste of water resources people vigilance is necessary, what we pursue is a kind of sustainable development. From the ads can be seen, a lot of water resource polluted in use and waste, leading to the final only a drop of even is not enough for us to drink, we have some good wishes, if the entire process can turn the clock back, that will be very perfect, but it is not possible, so we only cherish our current water resources.

University

Beihang University

Beihang University
Beijing, China

Shuang Li,
Beihang University