Acid - washed, flux - calcinated diatomaceous earth is often used.通常使用酸洗的, 通量煅烧硅藻土.Diatomaceous earths are the skeletal remains of the tiny aquatic plants deposited centuries ago.硅藻土是百年前水生植物沉淀下来的遗骸.Add 20 mg. of diatomac...
They are also of interest in disabusing our minds of the tyranny of certain facile generalizations.它们还可以使我们的头脑摆脱某些轻率的结论的束缚.Certain generalizations can be derived from the data in Table 6.从表6的数据可以得出某些结论.They were of great...
The level of serum E 2 in male can increase on exposure to pesticides of cypermethrin.在雄性动物中,氛佩菊酷能升高血清中EZ的浓度.It dedicated that cypermethrin had fine control effect to the Cyrtotrachelus buqueti.显示了氯氰菊酯对长足大竹象具有较好的防治效果.The...