The phosphate was deposited by the decay of marine microorganisms.海洋微生物腐烂后沉积形成磷酸盐。We make superphosphate by reacting rock phosphate with sulphuric acid.我们使磷酸盐岩同硫酸发生化学反应制造过磷酸钙.About two - thirds of the weight of phosphate...
He enjoys going to wrestling bouts.他喜欢参加摔跤比赛.The theorists from academe, we found, were wrestling with the same concerns.我们发现, 学院里的理论家们也正在为同样的问题而苦思冥索着.But there's more to my job than wrestling the anaconda.但是我的工作可不仅...