Modification for synthetic purposes on the Diels - Alder adducts 56 and 62 has only rarely been considered.为了达到合成的目的,对Diels-Alder加 成物(56)和(62)加以改造的问题很少有人考虑.The meanders of a prattling brook, were shaded with straggling w...
The microorganisms involved in symbiosis with the alder tree are actinomycetes of the genus Frankia.而与赤杨共生的微生物是放线菌.Its name is Ben Alder , it is a wild , desert mountain full of hills and hollows.它的名字是本·亚尔德, 是一座尽是些山岗和鸡谷的...
Stones are bedded in cement.用水泥砌牢石头.She bedded the children down without much trouble.她没费多少事就把孩子安顿睡了.On those nights when they could find no monastery or inn to take them in, they bedded down in the fields.那几天晚上，他们找不到可以投...
It was true , acknowledgment in most cases of affronts was counted reparation sufficients.的确, 大部分的无理举动,只要认罪就可算做很够的赔偿了.He counted off five men to help with the job.他挑选五个人来帮助做这件事。Family background could hardly have been co...
摘要前列腺特定抗原 ( PSA ) 为一已经定性清楚之人类前到腺特定醣蛋白.Prostate - specific antigen ( PSA ) is a well characterized human prostate specific glycoprotein.作为离开被感染细胞的病毒粒子起作用的胜肽聚醣蛋白.As peptide glycoproteins react with viral particles leaving ...