黄石国家公园狼计划是一项有价值的实验，有助于生物学家决定是否将狼重新引入美国其他地区。
The Yellowstone wolf project has been a valuable experiment to help biologists decide whether to reintroduce wolves to other parts of the country as well.
黄石地区的灰熊数量已经上升到约600头，比恢复计划的目标多出100头。
The grizzly population in the Yellowstone region has climbed to an estimated 600, 100 more than the recovery goal.
应用推荐