甲烷和丙烷是烷烃。Methane and propane are alkanes.丙烷气钢瓶a propane gas cylinder亚胺基杂环丙烷季铵盐的阳离子,一定是按协同反应的方式开环的.The aziridinium ions must all be opened by a concerted process....
Three hundred thousand tons of cereals are needed to replenish stocks.需要30万吨谷类补充库存。They replenish the Xiakangjian flora and verify that this flora belongs to the Cathaysia - Gondwana mixed flora.等植物化石,进一步完善了夏康坚植物群的组合面貌,证...
...the transformation wrought by the technological innovations of the industrial age.由工业时代的新技术方法促成的变化Carpets, Rugs, Mats and Durries, General Collectables, Wrought Iron.采购产品地毯, 毯子, 垫和棉花地毯, 牛仔裤藏的物品, 铸铁.The rattan and wrou...
You'll hit on exactly the most efficient method of revenging yourself on me.你正好找到了你对我报仇的最好方法.They pant for an opportunity of revenging that humiliation.他们伺机为自己受到的羞辱报仇....