1. Another time he was seen using a check for $ 1500 as a bookmark . Then he lost the book!
    另一次, 有人看见他把一张一千五百美元的支票当作书签用.后来那本书丢了!

2. At one time Nigeria was a British colony.
    过去，尼日利亚是英国的殖民地。

3. As usual, the police will have a difficult time. They will be trying to keep order.
    如往常一样，警察的日子将不太好过。他们要设法维持秩序。

4. A long time ago the tiny country of Switzerland was ruled by Austria.
    很久以前,瑞士这个小国被奥地利统治.

5. After years of pre -conditioning, most of us have developed an unshakable faith in railway time- tables.
    经过多年的应验之后，我们多数人对铁路时刻表都产生了不可动摇的信任。

6. At that time, however, she was not only the largest ship that had ever been built, but was regarded as unsinkable.
    然而在当时,它不仅是有史以来建造得最大的一艘轮船,而且被视为一艘不会沉没的船只.

7. As the time and cost of making a chip drop to a few days and a few hundred dollars,
    由于制造一块芯片的时间已缩短至几天，费用也只有几百美元，

8. At the same time our sympathy for Galileo´s opponents has grown somewhat.
    与此同时，我们对伽利略的反对派的同情也有所增加。

9. At that time, however, she was not only the largest ship that had ever been built,
    当时，这艘轮船不仅是造船史上建造的最大的一艘船，

10. ´That´s Sebastian. You forget that I was a medical student once upon a time.´
    "那是塞巴斯蒂安。你忘了我以前是学医的了。"