n. 轻歌剧，小歌剧( operetta的名词复数 )；

n. 神示所( oracle的名词复数 )，神谕，圣贤，哲人；

n. 鸵鸟( ostrich的名词复数 )，逃避现实的人，不愿正视现实者；

n. （水）獭( otter的名词复数 )，獭皮；

有机食品；

按固定差价；

v. 同意，认可( okay的现在分词 )；

[例句] ...a shooting range where it's OK to use weapons...

[例句] Is it okay if I come by myself?...

v. 使烦恼( oppress的现在分词 )，压迫，压制；

[例句] These people often are oppressed by the governments of the countries they find themselves in...

[例句] We are not normal like everybody else. If we were they wouldn't be oppressing us.

n. 欧姆（电阻单位）( ohm的名词复数 )，欧姆定律；

n. 敬礼，行礼( obeisance的名词复数 )，敬意；

[例句] While he was still young and strong all paid obeisance to him.

[例句] One by one they came forward, mumbled grudging words of welcome, made awkward obeisances.

n. 不明( obscurity的名词复数 )，费解，隐晦，晦涩或不明的事物；

[例句] For the lucky few, there's the chance of being plucked from obscurity and thrown into the glamorous world of modelling...

[例句] The latter half of his life was spent in obscurity and loneliness.

n. 鸦片制剂（通常用于镇痛或催眠）( opiate的名词复数 )，缓和，减轻；

[例句] One woman suffered such severe pain she had to take opiates to control it.

[例句] ...the opiate of mass entertainment...

v. 同意，认可( okay的第三人称单数 )；

[例句] ...a shooting range where it's OK to use weapons...

[例句] Is it okay if I come by myself?...

v. 使烦恼( oppress的第三人称单数 )，压迫，压制；

[例句] These people often are oppressed by the governments of the countries they find themselves in...

[例句] We are not normal like everybody else. If we were they wouldn't be oppressing us.

v. 胜过( outdo的现在分词 )；

[例句] It was important for me to outdo them, to feel better than they were...

[例句] Both sides have tried to outdo each other to show how tough they can be.

v. 除去( obliterate的现在分词 )，涂去，擦掉，彻底破坏或毁灭；

[例句] Their warheads are enough to obliterate the world several times over...

[例句] Whole villages were obliterated by fire.

v. 除去( obliterate的第三人称单数 )，涂去，擦掉，彻底破坏或毁灭；

[例句] Their warheads are enough to obliterate the world several times over...

[例句] Whole villages were obliterated by fire.

n. 被发价人，受盘人；

vt. 使过度发达，显像过多；

n. 鹗；