烯空气跟空气十分近似.Olefin gas closely approximates air.所有的主要难点都涌现在烯酮 ( 1 ) 的合成中.All the chief difficulties crop up in the synthesis of the enone ( 1 ).某碳氢化合物已知可能是烯烃或是烷烃.A hydrocarbon was known to be either an alkene or alkane....
Conclusions The homoharringtonine injection of topical pterygium before excision was effective for decreasing recurrent pterygium.结论术前翼状胬肉局部注射高三尖杉酯碱可以减少翼状胬肉术后复发.Our economy continues to grow, our financial foundation rem...