“四倍的”用英语怎么说

在本世纪末实现工农业总产值增四倍的目标是完全可能的.It is entirely possible to achieve the goal of quadrupling the gross annual value of industrial and agricultural production by the end of the century.再加入沙门氏菌就会产生二倍到四倍的致癌化合物.When added to Salmone...