精选优质文档-倾情为你奉上Book 2 Unit 3 Journey through the odyssey years奥德赛岁月之旅Most of us know about the phases of life which we label to parallel different age groups and life stages: childhood, adolescence, adulthood, and old age. We think of infancy before childhood and middle age before old age, with each unique phase bringing its own peculiar set of challenges. These challenges can be overcome by acquainting ourselves with them, such as the childs need to learn, the adults need to find th