In other words , multiple approaches are needed to meet a variety of decision situations 換句話說,面對各種各樣的決策情況需要多種的方法。
Thus , on many occasions a variety of approaches will be discussed , and the ( recent ) historical development of these approaches are emphasized 因此,在很多情況下,多種的方法都將被討論,而且這些方法(最近的)歷史發(fā)展也是重點。