分类学上的种是根据表型不连续性而不是根据互交可孕性来确定的.Taxonomic species are defined on phenetic discontinuities, not on interfertility.把无融合生殖小种 ( 无性种 ) 作为分类学上的种来承认,这点具有更大的迷惑性.The temptation to recognize apomictic microspecies ( agamospecies ) a...
Polyurethane elastomers based on glycols ( PEA, PPG PTMG ) , diisocyanate ( TDI ) and chain extender ( E - 300 ) were prepared.以多元醇 ( PEA, PPG,PTMG ),PDI, E300为原料,制备了 PU 弹性体.Polyether - type isocyanate prepolymers are pr...
He has already been blamed for his party's lackluster performance during the election campaign.他的政党在竞选活动中表现平平,他因此已受到指责。To a man, the surveyors blamed the government...调查员们无一例外地都指责政府。He blamed the press for forcing ...
Striker Alan Smith was guilty of two glaring misses.前锋艾伦·史密斯两次严重失误,将球射偏。The striker was unable to find his scoring touch.那个前锋找不到进球的感觉。The Arsenal striker remains jauntily confident.阿森纳队的前锋仍旧信心十足,精力充沛。...