O-12：out of breath 上气不接下气 A:Oh, youre out of breath! Whats happened? A:哦，你上气不接下气地，出什么事了？ B:A gang of bastards are wildly shooting on the next street. We must leave this place the soonest! B:一帮...

O-11：out of a clear blue sky 出乎意料 A:The trouble is not that. It is that he may suddenly remember something I promised him a couple of weeks ago, out of a clear blue sky. Then he complains that I have gone back on my words. A:麻烦不...

O-10：osmosis 埋头 A:Mary is really a diligent girl. A:玛丽真是一个勤奋的姑娘。 B:What do you mean? B:为什么这么说？ A:She learns to speak Lation by osmosis within three months. A:她废寝忘食三个月学会了拉丁语...

O-9：open someones eye to 使某人意识到 A:The eountry is strong only in appearance. Dont you think so? A:这国家只是外表强大，你不这么认为吗？ B:Yes. In fact therere quite a large number of people who have no food to...

O-8：ones own flesh and blood 骨肉至亲 A:Mrs, Smith, you are always worried about your children. A:史密斯太太，你总是牵挂着孩子。 B:Theyre my own flesh and blood. Its hard for me to see them suffering. B:他们都是我的...

O-7：ones heart in ones mouth 吓得要命 A:When she told me that she would marry no man but Dick, my heart was almost in my mouth. A:当她告诉我除了迪克她谁也不嫁时，我吓得要命。 B:You were scared, too? I dared not t...

O-6：once in a blue moon 极为罕见 A:The river is much higher than the ground. A:河比地高得多。 B:How dangerous! B:多危险呀！ A:Yes, it is. A:是呀。 B:What if the river overflowed its bank? B:河水要是涨过了岸，怎么...

O-5：on the whole 总的看来 A:Do naughty boys upset you? A:你讨厌调皮的孩子吗？ B:Oh, no. On the whole, I would rather see children active. B:不讨厌，总的来说，我喜欢活泼一点的孩子。 A:What about the troubl...

O-4：on the side 另外 A:What does your friend Jim do? A：你的朋友吉姆是干什么的？ B:He is a teacher, but he makes a little money on the side by repairing cars in his free time. B：他是个教师，但也在空闲时兼修汽...

O-3：on the heels of 接踵而来 A:The flood will come on the heels of the heavy rain. A:大雨后洪水会接踵而来的。 B:I wonder if the municipal government will take some preventive measures. B：不知道市政府会不会采取一...