探讨了稀土化合物用作环保汽油抗爆剂的可能性.Capabilities using rare earth compounds as environmentally friendly gasoline antiknocks were explored.介绍了MMT抗爆剂在中国石油锦西石化公司的使用情况.The article introduces the application status of MMT antiknock additiv...
Please prune plum trees promptly. The plum pickers plucked the plump plums.请迅速修剪李子树. 摘李子的人摘下饱满了李子.Prune rambling roses when the flowers have faded.花朵凋谢后要剪除杂生的玫瑰枝。Can you tell me whether it is a good thing to prune an app...
下白垩统的扎赉诺尔群的沉积相的主要类型为三角洲相, 湖相和浊流相.The facies types of the Lower Cretaceous are mainly delta, lake and turbidity.酒泉盆地普遍发育了始新统与下白垩统之间的不整合.The unconformity between the Eocene and the Lower Cretaceous is common in Jiuquan bas...