increasingly severe droughts
日益严重的干旱
以上为机器翻译结果，长、整句建议使用 人工翻译 。
On the the 40th anniversary of Earth Day, this warming planet we live on is posing serious new challenges to human civilization: increasingly severe droughts, floods,and storms across the globe, and slowly rising ocean levels.
VOA: standard.2010.04.21
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