亚洲精品1234,久久久久亚洲国产,最新久久免费视频,我要看一级黄,久久久性色精品国产免费观看,中文字幕久久一区二区三区,久草中文网

BBC Learning English 英語(yǔ)教學(xué)

媒體英語(yǔ)會(huì)帶大家一起學(xué)習(xí) BBC 撰稿人在報(bào)道世界大事時(shí)常用到的單詞和短語(yǔ)。

Special book makes water drinkable 巧用書(shū)本過(guò)濾飲用水

Drinkable water is a rare commodity for millions of people around the world

收聽(tīng)與下載

美國(guó)的研究人員設(shè)計(jì)了一本教人們?nèi)绾瓮ㄟ^(guò)過(guò)濾方式獲取飲用水的說(shuō)明書(shū)。而這本書(shū)的每一頁(yè)紙都可以被撕下來(lái)充當(dāng)濾紙。BBC Jonathan Webb有以下報(bào)道:

More than 600 million people around the world lack access to clean drinking water and this book has the potential to help.

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.

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%.

Glossary 詞匯表 (點(diǎn)擊單詞收聽(tīng)發(fā)音)

關(guān)注和訂閱

人氣排行
熱搜詞
 
 
精華欄目
 
Copyright ©