植物不能离开磷元素而生存。
是磷元素唯一稳定的同位素。
磷是构成生命的重要元素之一,也是土壤中有效性最低的一种营养元素。
Meanwhile, it is also one of the least available nutrients in the soil.
除此之外白口铸铁还常常添加促进白口化的元素,例如磷等。
Besides white cast iron was often add promoting chilling turn elements, such asp.
除此之外白口铸铁还常常添加促进白口化的元素,例如磷等。
Besides white cast iron was often add promoting chilling turn elements, such asp.
应用推荐