Some problems concerning groups are best attacked by using graphs.有关群的一些问题可以使用图来很好地解答.Diagrams and graphs are indispensable visual aids in many aspects of economics.图形和图解在经济学的许多方面是重要的形象工具.We shall consider partitions of ...
若在其他人定义一组字词时,它们是否一样 呢 ?If somebody else defines a set of terms: are they the same?子句是指一组字,这组字包括著主语和动词.A clause is a group of words containing a subject and a verb of its own.它是一组字串,用以阻止 ( 未授权的 ) 用者存取档案.It is a string of ...