标签：地下水 相关文章
China's capital is known for its horrendous smog and occasional sandstorms. Yet one of its major environmental threats lies underground: Beijing is sinking. 中国的首都北京以可怕的雾霾和偶尔发生的沙尘暴远近闻名。而一个重要
发表于:2019-02-04 / 阅读(63) / 评论(0)
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