1·Water-insoluble HBS lignin was separated from the liquid reaction mixture by water precipitation.
不溶于水的高沸醇木质素通过加水沉淀的方法，从反应后的液体混合物中分离。
2·The obvious water precipitation reduction and oil increase are achieved in polymer displacement in Gudao Oilfield.
孤岛油田聚合物驱试验取得了明显的降水增油效果。
3·From what I remember, water changes back and forth from water in lakes and oceans to vapor, and then back to water again when it falls as rain or snow, as precipitation.
根据我的记忆，水往复地变化，从湖泊和海洋里的水变成水蒸气，然后当它以雨或雪——也就是降水的形式落下时又变成水。
4·Water is part of a large cycle: it travels over land via rivers and lakes and through the oceans before evaporating \ into \ the atmosphere and eventually returning to the surface by precipitation.
水是一个大循环的一部分：水蒸发到空气中，最终又通过雨雪等降水方式回到地表，在进入这个循环之前，水通过河湖流过陆地，进入海洋。
5·Made of limestone, tufa forms as a byproduct of the precipitation of carbonate minerals from surrounding water.
凝灰岩是由石灰岩所组成，它是在其周围湖水里的碳酸盐矿物沉淀的副产品。
6·The water molecules will eventually evaporate, condense, and recycle back to Earth as precipitation.
水分子会蒸发，凝结，形成降水，重新进入地球的水循环系统。
7·The Columbia River in the us Northwest lost about 14 percent of its volume from 1948 to 2004, largely because of reduced precipitation and higher water usage in the west.
在1948年至2004年间，位于美国西北部地区的哥伦比亚河的流量减少了约14%，这主要是由于降水量减少以及美国西部用水量增加。
8·Summer precipitation has decreased and the increase in population has put pressure on the region's water supplies.
而夏季降水却减少了，人口也增加了，这对该区的供水也造成了压力。
9·Water in reservoirs behind dams, plus the water used to irrigate nearby land puts more moisture in the air, which falls as precipitation.
大坝后面水库中的储水，加上用来灌溉土地的水，会增加附近地区的潮湿度，使降水量提高。
10·Water continually evaporates, condenses, and precipitates, and on a global basis, evaporation approximately equals precipitation.
水持续蒸发，冷凝，沉降。 在全球范围看来，蒸发量约等于沉降量。