He's got a surface flow of suavity, but he's rough as a rasp underneath.他表面看来和和气气的, 其实是个粗野狂暴的恶棍.rasp with a file用锉子锉There was an ugly rasp in his voice.他说话时声音十分刺耳难听.Snow muffles the shriek of metal and the rasp...
聚丁二烯经一系列反应转变成丙啶基化合物 ( 聚丁二烯亚胺 ).Polybutadiene is changed to an aziridinyl compound ( polybutadieneimine ) by a series of reactions.丁二烯的衍生物,用于聚合制成氯丁橡胶.A synthetic rubber made from the polymerization of butadiene sodium.利用哈...