任选的是, 可用加氢催化剂将纯化的二聚异丁烯加氢生成异辛烷.Optionally, the purified diisobutylene may be hydrogenated to isooctane hydrogenation catalyst.应用正碳离子聚合的方法合成新型聚异丁烯遥爪预聚物.The new telechelic prepolymers of polyisobutylene have been synthesize...
Child's language, child psychology, childhood, Interesting, you can not help laughing.孩子的语言, 孩子的心理, 童真 、 童趣, 会让你情不自禁笑出声来.I can not help thinking ( that ) I am a failure.我不能不认为我是个失败者.On seeing it, he can not help rec...
In the fully plastic condition, the neutral axis does not necessarily pass through the centroid.在全塑状态下, 中性轴不一定需要通过形心.Centroid tracking algorithm is widely used because of its simplicity and quick run speed.形心跟踪算法因为简单、执行速...
Tom glanced around to see if we mirrored his unbelief.汤姆瞥了大家一眼,看看我们脸上是否也反映出他的怀疑.He slipped from the table, laughing softly in unbelief.他从桌子上滑下来, 微微一笑,表示不怎么相信她的话.John was staring as if in unbelief.约翰难以置信地瞪视着....