1. obey/observe/ keep to the school rules 服从；听从2. object to doing 反对objection 反对 have no objection to 不反对 objective 客观的,目的 an objective report Your objective is to enter a good university.3. oblige sb to do = force sb to do 迫使 I'm obliged to you for doing ... 因做…而感激…4. observation .观察 keep sth under observation 观察… observe 遵守；观察 observe sb do/doing sth observe one's birthday 庆祝…生日5. obstacle 障碍物 clear away the obstacle 6. obvious 明显的，清楚的 It was obvious to everyone that he was lying. You shouldn’t tell such obvious lies.7. occasion 场合；时刻 on this happy occasion .在这个快乐场合下 on the occasion of 8. occupation 工作 a side occupation 副业occupy a lot of room (=take up) 占 据 , Is this seat occupied ? occupy an important position occupy oneself in doing , be occupied in/with = be busy in doing/with 忙于干…9. occur 发生 Don't let this occur again. (happen, take place) The Olymipcs occur every four years. It occurred to sb that ... 人突然想到… It occurred to me that I forgot my pen in the classroom.10. odd 古怪的 oddly enough = strangely enough 说也奇怪 odds and ends 零碎小东西11. in the east of be born of 出生于 be afraid of be made of （材料不可见） be full ofof the same opinion/age think of 记起（think about 考虑） dream of 梦见 learn of 记牢be made up of 由…组成 in memory of 纪念 in search of 寻找 cure 1sb ofget rid of 除去 inform sb of 通知 remember of 记起… suspect sb of 怀疑 rob sb of out of stock all of a sudden 突然 12. see sb off turn/switch off take off 取消，脱衣，起飞，离开 be well off 富有pay off 还清 be off duty 不上班 off the point 不在要点 May Day is only a week off. 五一只有一星期了.13. offend sb 冒犯 b...
