The wetland is one of the three ecological systems in the world and it is the important part of the Globe.

湿地为全球的三大生态系统之一，是地球生态系统的重要组成部分。

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The wetland is one of the three ecological systems in the world and it is the important part of the Globe.

湿地为全球的三大生态系统之一，是地球生态系统的重要组成部分。

youdao