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...
Furthermore, externalities are also present.而且, 也出现了外在化问题.The third involves the undesirable externalities that may accompany productivity increases.第三是伴随生产率提高而产生的不良的外部影响问题.As we saw earlier, the market mechanism breaks ...
Swimming is probably the best form of exercise you can get.游泳或许是现有的最佳锻炼方式。Lack of exercise can lead to feelings of depression and exhaustion.缺乏锻炼会导致抑郁和疲劳。Other amenities, less commonly available, include a library and ex...
His pleasant, somewhat ordinary face suggested amiability rather than astuteness.他那讨人喜欢而近乎平庸的脸显得和蔼有余而机敏不足.I found his amiability charming.我觉得他和蔼可亲，富有魅力。I watched my master's face pass from amiability to sternness.我瞧...