Parallel evolution in Litsea and Lindera of Lauraceae.木姜子属及山胡椒属的平行演化.A method on synthesis of ionone from litsea cubeba oil had been developed.改进了由山苍子油合成紫罗酮的方法.Process for the isolation of citral from natural Litsea cube...
A vertex with zero outdegree is called a sink.出度为零的顶点称作收点.Vertex a is the initial vertex and b is the terminal vertext.a顶点是始端顶点,而b是末端顶点.An edge corresponds to a corridor and a vertex to the conjunction of several corrido...
别再这样闲混下去了,做些有益的事吧!Do not idle about like this and do something useful.少时闲混, 老来穷困.A young man idle , an old man needy.比利整个上午都跟在她后面闲混.Billy dawdled behind her all morning....