介绍了一种在凝胶体系中用扩散法制备草酸亚铁的结晶方法.A diffusion method for the preparation of ferrous oxalate in a gel system was presented.实验结果表明:添加有氯化亚铁的细水雾,其灭火性能发生了显著变化.This paper presents an experimental study of fire suppression effectivene...
The man was brutish and coarse.那人野蛮粗俗。Using a pestle and mortar, pulverise the bran to a coarse powder...用杵和臼，将麸皮磨成粗粉。The voice, less coarse now, stirred her as it had then.现在那声音已不那么刺耳，它又如当年一样让她怦然心动。The voice, less coars...