There is a great deal to learn from Hal's expert approach.从哈尔熟练的方法中可以学到很多。Hal Sperlich was already at Chrysler when I arrived.我来到克莱斯勒公司时,哈尔·斯珀里奇已经先到.After a while everyone ceased to speak of Hal except in passing.过了...
Polymerization of isoprene in the presence of ( NdCl 3 + FeCl 3 ) n Phen HAl - ( i - Bu ) 2 was studied.本文报道由(NdCl_3+FeCl_3 ) ·nphen -HAl ( i -Bu ) _2催化体系引发异戊二烯聚合的结果.There is a great deal to learn from Hal's expert ...