topic outline就是写个题目来概括这一段的主旨，例：
1. Family Problems 家庭问题2. Economic Problems 经济问题sentence outline就更详细些了，用一句完整的话概括这一段的意思，例：1.When family conflicts arise as a result of divorce, adolescents suffer. 当离婚导致了家庭矛盾时，受伤的是青少年。
2. Some of the most negative effects on adolescents may be associated with economic problems. 对青少年最负面的影响可能与经济问题有关。
