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 ...
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...
Mediastinoscopy a limited role in patient selection for extrapleural pneumonectomy.而纵隔镜检查对于选择胸膜外全肺切除术的病人仅仅有着有限的作用.Objective To study the improved extrapleural thoracoplasty in the treatment of chronic tuberculous empyema...
What other home offers such a commanding view of the capital?还有其他的房子能像这幢一样俯瞰首都吗?Lovett was a tall, commanding man with a waxed gray mustache.洛维特是个威严的高个男人,蓄着灰白的八字胡。He got permission from his commanding officer to join me....