The yellowish brown smoke fumed up and swirled.棕黄色的烟雾冒出来，袅袅升起。He fumed and fretted and did not know what was the matter.他烦躁,气恼,不知是怎么回事."It's monstrous!" Jackie fumed.“真是太过分了！”杰姬气冲冲地说。Some manufacturers used a little...
Calcium cyanamide is poisonous and irritating to the skin.氰氨化钙是毒性物质,对皮肤有刺激性.A new process, urea - calcium cyanamide method, for producing thiourea from urea and hydrogen sulfide is proposed.利用尿素和硫化氢等原料制备硫脲, 提出了尿素 - 氰氨化钙法...