在线观看亚洲精品专区-在线观看亚洲免费-在线观看亚洲免费视频-在线观看亚洲欧美-欧美freexxx-欧美free嫩交video

食品伙伴網(wǎng)服務號
 
 
當前位置: 首頁 » 專業(yè)英語 » 專業(yè)知識 » 正文

Where does drinking water come from?

放大字體  縮小字體 發(fā)布日期:2007-08-29
核心提示:Drinking water can come from different resources. For one, it can be pumped from the ground through wells. This groundwater is than purified, so that it will contain no more contaminants and is suited to drink. Drinking water can also be prepared dir
Drinking water can come from different resources. For one, it can be pumped from the ground through wells. This groundwater is than purified, so that it will contain no more contaminants and is suited to drink. Drinking water can also be prepared directly from surface water resources, such as rivers, lakes and streams. Usually surface water has to undergo many more purification steps than groundwater to become suited to drink. Preparing drinking water out of surface water is much more expensive due to this. Still 66% of all people are served by a water system that uses surface water.
更多翻譯詳細信息請點擊:http://www.trans1.cn
 
[ 網(wǎng)刊訂閱 ]  [ 專業(yè)英語搜索 ]  [ ]  [ 告訴好友 ]  [ 打印本文 ]  [ 關閉窗口 ] [ 返回頂部 ]
分享:

 

 
推薦圖文
推薦專業(yè)英語
點擊排行
 
 
Processed in 3.988 second(s), 856 queries, Memory 3.64 M
主站蜘蛛池模板: 青青伊人91久久福利精品 | 五月天天爱 | 狠狠干狠狠鲁 | 青草青草视频2免费观看 | 亚洲欧美日韩在线观看你懂的 | 黄色拍拍拍 | 91天天操| 欧美人另类zooz | 久久福利青草精品资源 | 久久婷婷丁香七月色综合 | 女生扒开尿口让男生舔 | 亚洲国产香蕉视频欧美 | 日本在线视频一区二区三区 | 娇妻被黑人蹂躏 | 在线观看永久免费视频网站 | 天天视频国产精品 | 香蕉久久夜色精品国产小说 | 久久99精品福利久久久 | zsvdy午夜片| 欧美日韩中文字幕在线 | 欧美影院一区 | 久久综合久久88 | 在线观看黄网 | 五月综合激情视频在线观看 | 天天操夜夜摸 | 一级做性色a爱片久久片 | 一级特黄aa大片免费 | 久久久久久久久女黄 | 欧美黄色片在线 | 国产亚洲情侣久久精品 | 成人在线一区二区 | 成人午夜在线观看国产 | 性欧美精品 | 色播.com| 人人爱人人澡 | 国产三级在线 | 99插插| 日本v片免费一区二区三区 日本www.色 日本wwwwww | 国产牛牛 | 推倒都市极品贵妇 | 国产人人干|