Add 20 mg. of diatomaceous earth filter aid per liter of solution.对每升溶液加入20毫克硅藻土助滤剂.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 t...
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...
He then held the man in an armlock until police arrived.然后他反扭住那名男子的手臂让他动弹不得，直到警察赶到。He arrived on January 9, disheveled and much the worse for wear.他是1月9号到的，蓬头垢面，疲惫不堪。At about 4.30 p.m. Audrey arrived at the office.大约下午4点...
埃勒里的归来可以驱散一些抑郁的情绪。Ellery's return will help to chase away some of the gloom.卢埃林登上台阶，走进城堡主楼。Llewelyn was mounting the stairs up into the keep.埃利奥特跨过终点线时仅比对手落后半秒钟。Elliott crossed the finish line just half a second beh...