氰氨化钙是毒性物质,对皮肤有刺激性.Calcium cyanamide is poisonous and irritating to the skin.叠氨化银不溶于水或硝酸.Silver azide does not dissolve in water or in nitric acid.氨化作用、同化作用及滤池的硝化作用是氮的主要转化形式.Ammonification, nitrification and nitrogen assi...
他们因吸入大量烟尘被送往医院。They were taken to hospital suffering from smoke inhalation.他们的制服破破烂烂的,沾满了烟尘。Their uniforms are torn and sooty.烟尘在空中浮荡.The air resounded with smoke and dust....