Chemical pollutants released into water or spread through the air are often invisible to the human eye 释放到水体中或空气传播的化学污染物通常是不可见的。
Various types of water saving devices , which can fit easily into water taps , are available in the market 市面上可轻易安装于水头的不同类型的节约用水装置。
By plunging the hot metal into water , oil , or brine ( quenching ) , the desirable characteristics are retained 将灼热金属插入水中或盐水（淬火） ，还会保持理想的特性。
Place electrolytic bar into water sample , energize for electrolysis and claim that the tap - water is not clean 以电解棒，插入水样中，通电电解，声称自来水不乾净。
Practice for dispersing pigments and other materials into water - based suspensions with a high intensity mixer 用高密度搅拌器使颜料和其他材料散入水基悬浮液的实施规范
Should we content ourselves with being like grains of sand dropped into water , causing almost no ripples at all 我们仅仅应当满足于沙砾落入水中那般不起波澜的生活吗？
Following the steps of science advances , we have to occasionally stride into water that we don " t know 要跟上科学知识进步的步伐，我们有时就不得不涉入未知的水域。
They lift him up by his feet and lower his head into water ， with his arms tired behind him 抓住他的脚把他提起来，把他的脑袋放到水里，他的双手被反绑在背后。 （真惨！ ）
Officials are pouring money into water - treatment plants and reinforcing about 2 , 250 kilometers of riverbanks 政府还投入资金用于建设水处理厂、和加固约2 , 250公里的河堤。
" many chemical and industrial enterprises are built along rivers so that they can dump the waste into water easily , " chen said 他说， “很多化工企业都建在河边以便排污。
