水资源短缺已经成为21世纪严重的问题的翻译：Water shortages have become a 21st century serious problems 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

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Water shortages have become a 21st century serious problems

The water resources short already became the 21st century serious issues

shortage of water resources has become a serious issue 21

Water shortages have become a 21st century serious problems