禁毒专家说它可能会结束强效可卡因吸食泛滥的局面。Drug experts say it could spell the end of the crack epidemic.每隔几年他们就会因这条河的泛滥而被迫离开家园。The river flooded them out every few years.这座城市毒品泛滥。The city is awash with drugs....
A neutron is simply a neutral particle in the nucleus of an atom.中子就是原子核里不带电的粒子。Neutron is neutral and slightly heavier than the proton.中子是中性的,比质子略重.These elements alone, however, are not quite as satisfactory for neutro...
简要介绍以此类方法对合成苯甲醛的研究.Based on the reactions , this paper reports research for synthesizing benzaldehyde.再溴代得到2-溴 -4,5-二甲氧基苯甲醛,收率为91.9%,并分析溴代过程中甲酰基的邻位效应及溴代产物的稳定性.This product with Br 2 was obtained 2 - bromo - 4,5 - hydroxy...
The Vatican successfully mediated in a territorial dispute between Argentina and Chile in 1984.梵蒂冈成功地调解了1984年阿根廷与智利之间的领土争端。Argentina's economic policies were a hopeless mess.阿根廷的经济政策糟得一塌糊涂。Includes the population of...
The paper analyzed the cause of the declination in a raise boring.这文章分析了天井钻进偏斜的原因。Magnetic field, auroras, magnetic declination and magnetic field reversals.地球的磁场 、 极光 、 磁偏角和地磁极倒转.Memory declination in the and old aged p...