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
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,3 000 种本地植物——占美国近25 000 种植物的 10%——将可能灭绝
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
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
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