第1825期:Special book makes water drinkable

More than 600 million people around the world lack access to clean drinking water and this book has the potential to help.全世界有超过 6 亿人无法获得干净的饮用水，而这本书有可能提供帮助。It's relatively cheap, easy to ship and its pages serve two purposes: firstly, they are printed with instructions on how and why water should be filtered; secondly, they can be torn out and used as filters.它相对便宜，易于运输，其页面有两个用途：首先，它们印有关于如何以及为什么要过滤水的说明；其次，它们可以撕下来用作过滤器。The paper contains nanoparticles of copper or silver, which kill bacteria and the new trial results from water sources in South Africa, Ghana and Bangladesh confirm that on average the paper slashes the bacteria count of contaminated water by well over 99%.该纸含有铜或银纳米粒子，可以杀死细菌，而来自南非、加纳和孟加拉国水源的新试验结果证实，该纸平均可将受污染水的细菌数量减少 99% 以上。词汇表lack 缺乏potential 潜力torn out （从书本里）撕下来 nanoparticles 纳米粒子copper 铜，铜的 silver 银，银的 bacteria 细菌slashes 削减，大幅降低contaminated 受污染的