1. Otter is a fur-covered, fish-eating aquatic animal.
    水獭是全身长毛、以鱼为食的水生动物。

2. Oil rigs have to be repaired frequently and divers, who often have to work in darkness a hundred feet under water, have been frightened out of their wits by giant fish bumping into them as they work.
    钻井平台需要经常修理，潜水员常常要在水面100英尺以下摸黑工作，他们曾在工作时被撞到他们身上的大鱼吓得惊惶失措。

3. One kilogram of beef requires 7 kilograms of grain. People, therefore, may eat less red meat in the future and more fish.
    生产1公斤牛肉需要7公斤谷物。因此，人们在将来可能会少吃红色肉类，多吃鱼类。

4. I often fish for hours without catching anything.
    我经常一钓数小时却一无所获，

5. Instead of catching fish, they catch old boots and rubbish.
    他们往往鱼钓不到，却钓上来些旧靴子和垃圾。

6. Fish and chips has always been a favourite dish in Britain, but as the oceans have been overfished, fish has become more and more expensive.
    油煎鱼加炸土豆片一直是英国人喜爱的一道菜，但是随着海洋里的滥捕滥捞，鱼已经变得越来越昂贵。

7. Fish farming is very efficient: producing a kilogram of fish utilizes less than 2 kilograms of feed, but it takes 2.2 kilograms of feed to produce 1 kilogram of chicken.
    养鱼场的生产效率相当的高：生产1公斤鱼类只需要不到2公斤的饲料，而生产1公斤鸡肉需要2.2公斤的饲料。