obedient a. 服从的,顺从的
objection n. 反对(to)
obligation n. 义务,责任
oblige v. 迫使;使感激;施恩于
obscure a. 朦胧的;晦涩难懂的
v.使不明显,使模糊不清
observation n. 观察(结果)
observe v. 观察;遵守
observer n. 观察者
obtain v. 获得
occupy v. 占用;使忙碌
offence n. 犯罪(错);冒犯
offensive a. 冒犯的,攻击的;n. 进攻
omit v. 省略,删掉;遗漏
opponent n. 对手,敌手;反对者
opportunity n. 机遇
optimistic a. 乐观的,乐观主义的
option n. 选择
optional a. 选择性的;非强制的
original a. 最初的;原文的;有创造性的
originality n.独创性,新颖
originate v. 首创,开创,创始
ornament n.装饰品
outcome n. 结果
outwardly ad. 外表地;朝外地
overflow v. (使)溢出来
overload v. (使)超载;n. 超载
overlook v.忽略,遗漏
overtake v. 赶上,超过
overwhelm v. 使非常激动,使不知所措
overwhelming a. 压倒一切的
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