这种燃料的例子是一甲肼和二硼烷.Examples of such fuels are monomethyl - hydrazine and diborane.手性唑硼烷酮能够催化不对称1, 3偶极加成反应并取得很好的效果.Asymmetric 1, 3 - dipolar cycloaddition can be strongly catalyzed by chiral oxazaborolidines.该不对称催化还原反应的控制步骤是...
His lean body was engulfed in an ivory white afghan coat.他瘦削的身躯裹在一件象牙色的阿富汗大衣中.Though rather lean in the stalks you be a green - leaved old man still.你的老杆儿虽然枯啦,你这个老头儿,枝叶还青绿.Like most athletes, she was lean and muscular.跟大...