1. Some kids conduct aggressive behaviorsin response to their parents' disinterest.一些孩子用攻击行为回应父母的漠视。注解：disinterest /dɪs'ɪntrəst/ n.无兴趣, 不关心, 冷漠, 客观v.使无利害关系, 使不关心in response to ... 回应……2. My father has a persistent cough because of his smoking.我父亲因为吸烟一直咳个不停。注解：persistent /pər'sɪstənt/ adj.执着的, 不屈不挠的, 坚持不懈的, 连绵的，（尤指不好或不受欢迎的状态或情况）持续存在的，继续发生的because of ... 因为……3. She expressed her dissatisfaction with him.她对他表示不满。注解：dissatisfaction /ˌdɪsˌsætɪs'fækʃn/ n.不满意；不快；不悦express one's dissatisfaction with sb 对他表示某人的不满4. A bad habit, once formed, is difficult to get rid of.一旦养成了坏习惯，就很难改回来了。注解：get rid of ... 摆脱……；处理掉; 丢弃, 扔去; 排泄掉5. I expressed my gratitude to the policeman who offered me help.我向为我提供帮助的警察表示了谢意。注解：gratitude /'ɡrætɪtuːd/ n.感激之情, 感谢express one's gratitude to ... 对……表达某人的谢意
