After years of heated debate, gray wolves were reintroduced to Yellowstone National Park.
经过多年的激烈争论, 灰狼被重新引入黄石国家公园。
2017全国卷3
The disappearance of the wolves had many unexpected results.
狼群的消失导致了许多意想不到的后果。
2017全国卷3
Many farmers opposed the plan because they feared that wolves would kill their farm animals or pets.
许多农民反对这一计划, 因为他们担心狼会杀死他们的农场动物或宠物。
2017全国卷3
Fish and Wildlife Service carefully monitors and manages the wolf packs in Yellowstone.
鱼类和野生动物管理局在黄石公园对狼群进行了仔细的监控和管理。
2017全国卷3