Comparing with polyurethane, the prospects of the applications of isobutene telechelic oligomer are presented.并与聚氨酯材料相比较;说明了聚异丁遥爪预聚物的主要应用前景.Tert - octylamine was prepared with di - isobutene and hydrocyanic acid as mine ...
Who was at the helm when the collision occurred?当碰撞发生时,谁在掌舵?Down [ Up ] with the helm!转舵背 [ 迎 ] 风开!The boat seemed very slow to answer to any movement of the helm.这只船似乎对舵的转动的反应很不灵敏....
But don't call him lucky, Pete, that's underrating him.但是,别说他侥幸, 彼得, 那样说就等于低估了他.Underrating has the advantage of increasing physical life.低负荷运行具有能延长物理寿命的优点.I still go on underrating men of gold.我仍瞧不起腰缠万金的人....