现在把这种栽培方法叫做水栽法.Today this mothod of farming is called hydroponics.近几年来,水栽法种树植已在世界许多地区推广.In recent years hydroponic farming has been expanded to many parts of the world....
Leaching of copper from chalcocite with acidic acetonitrilecopper sulphate system was studied.研究了用酸性乙腈硫酸铜体系从辉铜矿中提取铜.The paper discusses a new method for producing cupric feed copper sulfate by chalcocite and ehalcopyite....
6 subtracted from 9 is 3.9减6等于3。We have subtracted $25 per adult to arrive at a basic room rate.我们已给每位成人房客减去了25美元，这就是基本的房费价格了。Mandy subtracted the date of birth from the date of death.曼迪用去世的日期减去出生的日期。...