Pav é set Dorado crystals shine on refined gold - plated metal elements delicately wrapped around a cotton cord. 精致迷人的镀金金属装饰,细致围绕着手链的棉绳,绽放富丽金色密镶水晶的闪烁光彩.
His critics say he's just being silly and petulant.批评家说他就是愚蠢和任性。She could be wayward, petulant, and disagreeable.她有时也会任性 、 脾气很坏 、 很暴躁.He picked the pen up with a petulant gesture.他生气地拿起那支钢笔。...
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...