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柬埔寨的水葫芦入侵湖泊，他们却任由其泛滥，这么做有什么目的？
柬埔寨人简直太奇怪了，别的国家看到水葫芦入侵，都害怕的要死。他们却拿这个入侵物种当作宝贝疙瘩，为什么柬埔寨人不害怕水葫芦入侵，他们要这些水葫芦有什么用？
不可思议的科普3/71
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