The new technology for the preparation of cryolite from fluosilicic acid and ammonium hydrocarbonate is introduced.介绍了氟硅酸、碳酸氢铵制备冰晶石的新工艺.Bites suction cup the toxin and apply 3 % ammonia solution or 5 % sodium hydrocarbon...
an apocalyptic view of history对历史抱极其悲观的观点Parts of the ocean there look just absolutely apocalyptic.海洋的很多区域看上去完全像是世界末日。He attempts to explore dismal landscapes , where apocalyptic marches echo and thunder.他试图探索那些回响着神启之音的凄...