Eutrophication is a worldwide environmental problem and has become the research focus nowadays.
湖泊富营养化是当前一个世界性的环境问题和研究焦点。
Nowadays, the environmental education thanks to the increasingly crucial worldwide environment problem has been one of the study fields under deep concern.
目前，日益严峻的全球性的环境问题使得环境教育成为一个倍受关注的研究领域。
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