Magdalena considered the past an irrelevant encumbrance.玛格达莱娜把过去看作毫不相干的累赘。I felt I was being an encumbrance to them.我感到自己成了他们的累赘。Only by overcoming our weaknesses can we advance without any encumbrance; only by uniting o...
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...