A synthetic rubber made from the polymerization of butadiene sodium.丁二烯的衍生物,用于聚合制成氯丁橡胶.Nickel fastens butadiene rubber product to already achieved international banner level.镍系顺丁橡胶产品已达到国际领先水平.The current offset press on ...
她根据作者、年龄和插图画家分别为该书编了索引。She's indexed the book by author, by age, and by illustrator.这个存量巨大的档案室的所有文件都已编了索引，可供研究人员使用。This vast archive has been indexed and made accessible to researchers.在索引中查找。Look it up in the index...