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...
大街的两旁种着蓝花楹，绽放的花朵汇成一片紫色的海洋。The avenues lined with jacaranda trees burst into a carnival of purple.地址为华盛顿特区，西北区，M大街2025号，邮政编码20036。The address is 2025 M Street, Northwest, Washington, DC, 20036.我们沿着艾维格大街一路飞奔到汽车那儿。We belted...
"Thank you very much for speaking with us." — "Not at all."“非常感谢您能和我们交谈。”——“不客气。”He's not at all worried about his car's reliability.对于自己那台车性能的稳定性他根本不担心。"Sorry. I sound like Abby, don't I?" — "No. Not at a...