一旦杂质沉淀下去，油就可以分级了。Once its impurities had settled, the oil could be graded.将硫酸盐加入该溶液会产生沉淀.Adding sulphate to the solution will give a precipitate.渣滓沉淀在容器的底部.Dregs settled at the bottom of the container....
经济发展出现了许多新的趋势，不确实性也显著增强了。There are many new trends in economic development with the incertitude growing .这事的确实性已得到承认.Its certainty has been accepted.它的确实性大概跟红军合唱团差不多吧!It has about as much authenticity as the Red Army Cho...