1. Some kids conduct aggressive behaviorsin response to their parents' disinterest.一些孩子用攻擊行為回應父母的漠視。注解：disinterest /d?s'?ntr?st/ n.無興趣, 不關心, 冷漠, 客觀v.使無利害關系, 使不關心in response to ... 回應……2. My father has a persistent cough because of his smoking.我父親因為吸煙一直咳個不停。注解：persistent /p?r's?st?nt/ adj.執著的, 不屈不撓的, 堅持不懈的, 連綿的，（尤指不好或不受歡迎的狀態或情況）持續存在的，繼續發生的because of ... 因為……3. She expressed her dissatisfaction with him.她對他表示不滿。注解：dissatisfaction /?d?s?sæt?s'fæk?n/ n.不滿意；不快；不悅express one's dissatisfaction with sb 對他表示某人的不滿4. A bad habit, once formed, is difficult to get rid of.一旦養成了壞習慣，就很難改回來了。注解：get rid of ... 擺脫……；處理掉; 丟棄, 扔去; 排泄掉5. I expressed my gratitude to the policeman who offered me help.我向為我提供幫助的警察表示了謝意。注解：gratitude /'ɡræt?tu?d/ n.感激之情, 感謝express one's gratitude to ... 對……表達某人的謝意
