They were principally used to catalyze aldol, allylation, Diels - Alder, ene and Friedel - Crafts reactions. 它们主要被用来催化Aldol, 烯丙基化, Diels-Alder, Ene和 Friedel -Crafts等反应.
This review summarizes the stages, clinical characteristics and treating methods of retinal angiomatous proliferation.本文对视网膜血管瘤增殖的分期 、 临床表现以及治疗方法作一综述....
甲板上有一团乱绳.There is a tangle of ropes on the deck.我渴望运用一点山姆森的力气, 把这一团乱丝象拉绳子般地拉断!I long to exert a fraction of Samson's strength, and break the entanglement like tow!真是一团乱! 我敢肯定是卢克干的.It's a mess. I'm pretty s...
Many geophysicists find this technique unsatisfactory.许多地球物理学家发现了这种方法的缺陷.Explorationists in general and geophysicists in particular search for hydrocarbon traps.绝大部分勘探家和部分地球物理学家寻找的是烃类圈闭.Explorations in general and geophy...
...misshapen vegetables...奇形怪状的蔬菜He still took out the Jacka's letter, misshapen from pockets and soggy with sweat.他又从口袋里掏出这封皱巴巴的, 汗水浸湿的信.And what were the people around him but so many blurred, misshapen figures?在他...