一、英譯中：（15 分）       The first element which differentiates human from animal existence is anegative one: the relative absence in man of instinctive regulation in theprocess of adaptation to the surrounding world. The mode of adaptation of theanimal to its world remains the same throughout. If its instinctive equipmentis no longer fit to cope successfully with a changing environment, the specieswill become extinct. The animal can adapt itself to changing conditions bychanging itself. In this fashion, it lives harmoniously, not in the sense ofabsence of struggle but in the sense that its inherited equipment makes it afixed and unchanging part of its world; it either fits in or dies out.