1. From time to time , during the night , there was a moan from the sick man.
    晚上，病人不时地长出呻吟声。

2. Fifteen students are taking part in the contest.
    有十五个学生参加竞赛.

3. From the shore line, out to a distance which may be anywhere from a few miles to a few hundred miles, runs the gentle slope of the continental shelf, geologically part of the continents.
    从海岸线向大海延伸几英里到几百英里的区域是大陆架慢坡，从地质学上来说，它是大陆的一部分。

4. For a time it assumes a miraculous individuality that, in the end, is reabsorbed into the great ocean of life.
    一度它获得非凡的个性，但最终又被重新融进生命的大洋。

5. For instance, if you are older you have less time to recover from any major losses,
    比如说，如果你年纪较大，你从重大投资损失中恢复过来的时间就较少，

6. For a long time, I watched them scurrying around the base of the tree in bewilderment.
    在很长一段时间里，我看见蚂蚁围着大树底部来回转悠，不知所措。

7. For the first time in his life, he became the proud owner of a bed which had springs and a mattress.
    他平生第一次自豪地拥有了一张既有弹簧又带床垫的床。

8. For a whole week I did not smoke at all and during this time, my wife suffered terribly.
    整整一个星期我根本没有吸烟。在此期间，我妻子吃尽了苦头。

9. Fortunately, I wasn´t wearing it at the time.
    幸亏我当时没戴帽子。

10. From time to time, when I looked up from my page, I saw the master looking about him as if he wished to impress upon his mind everything in the room.
    我不时从练习纸上抬起头，每一次都看见老师在望着周围，仿佛要把教室里的一切都印在心上。