R ” 是取化基,如乙氧基 、 甲氧基及它们的环氧和烷氧同系物或卤基.R " is a replaceable function , e . g . acetoxy, methoxy, their acyloxy and alkoxy homologs or halo.蒸馏得质量分数高于98%的邻乙氧基苯甲酸,收率为92%.Distillation gave o ethoxybenzoic acid with 98 % of the p...
当她把烟吸进肺里时，她的双颊瘪了下去。Her cheeks hollowed as she drew smoke into her lungs.他吸进冰冷的空气。He breathed in the frosty air.我们抬起头,吸进新鲜 、 干净的空气.We lifted our heads to breathe in the fresh, clear air....
Objective conidia of Pyricularia Oryzae to the screening of antimitotic constituents from marine animal sea hare.目的:利用稻瘟霉生物活性成分跟踪筛选模型,筛选海兔中抗有丝分裂活性成分....
Bleeding may be herralded by several day of exacerbation of pain.数天的疼痛加剧可能为出血的先兆.Nonetheless, none of these pathogens is associated with severity of asthma exacerbation.然而, 这些病原体与哮喘恶化的程度无关.His foolishness was followed by...