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1. Looking beyond the 10-year period， the botanists estimate that some 3，000 native plant species may become extinct in the foreseeable future more than 10 percent of the approximately 25，000 species of plants in the United States.「译文」 在展望10年后的情况时植物学家们估计，在未来可预见到的`时间内， 3000种本地植物占美国近25 000种植物的10%将可能灭绝。
2. The annual migrations of wildfowl and many other animals certainly cannot be regarded as a form of exploration， because such movements are actually only shifts from one habitat to another for the purpose of avoiding seasonal climatic variations.?
「译文」 野生禽类和许多其他动物每年的迁徙，当然不能被看做是一种探险行为，因为，这些迁徙活动实际上只是从一个栖息地转移到另一个栖息地，以躲避气候的季节性变化。
3. Proponents of G-M foods argue using biotechnology in the production of food products has many benefits： it speeds up the process of breeding plants and animals with desired characteristics; can be used to introduce traits that a product wouldnt traditionally have; can improve the nutritional value of products; and can produce cheaper and more environmentally?friendly fertilizers.