背诵为王第四册第34课

Lesson34 Food of the Future?
Scientists are always trying out new ways of growing food, even though they can only guess what food will be like in the future. Here are some of their imaginations.
The sea can be farmed. Only one third of the earth's area is island. The remainder is sea. The ocean contains huge amounts of tiny sea-animals called Krill. Krill are already in some fish products, such as fish sticks and canned crab. Next time you buy canned or frozen seafood look carefully at the label.
You might see krill listed as one of the ingredients. Seaweed is another source of future food from the ocean. It is used in ice cream and some bread.
Animals can be changed. A farmer is able to "engineer" his animals by adding hormones to their feed. Hormones can make chicken meat more tender or beef less fat. For example, dairy farmers add growth hormones so that calves produce milk sooner than normal.
New crops can be planted.
Today, rice supports more than half the world's population. But it takes a lot of water to grow rice. Scientists predict the climate will get drier during the next century. Therefore, it might be impossible to grow rice in the future. Some farmers are experimenting with new crops. Farmers like to grow beans because they don't need much water, and beans also improve the quality of the soil. The soybean makes a good substitute for rice and meat.
krill [动]磷虾
fish stick 冻鱼条
hormone 荷尔蒙, 激素