七大江河水系有40%受到严重污染的翻译：There are seven major rivers and river systems 40% were seriously polluted 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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There are seven major rivers and river systems 40% were seriously polluted

Seven Dajiahg River river systems have 40% to receive the serious pollution

7 OE river system has a 40 per cent are severely contaminated

There are seven major rivers and river systems 40% were seriously polluted