The US Fish and Wildlife Service said that nearly a billion monarchs have disappeared from overwintering sites since 1990.
美国鱼类和野生动物管理局表示，自1990年来，近十亿只帝王蝶在越冬地点消失了。
The US Fish and Wildlife Service carefully monitors and manages the wolf packs in Yellowstone.
美国鱼类和野生动物管理局对黄石公园的狼群进行了仔细的监控和管理。
Polar bear patrols are carried out daily by the local community and the US Fish and Wildlife Service.
北极熊每日动向由本地和美国鱼类和野生动物组织负责。
In July, Gabriela Chavarria was named the top science adviser for the US Fish and Wildlife Service (USFWS), based in Washington DC.
七月份，加比·瑞拉-查维瑞亚被任命为美国鱼类野生物保护部的首席科学指导专家，该组织位于华盛顿。
The US Fish and Wildlife Service concluded in a report issued recently that the eastern cougar is extinct, the Guangzhou Daily reported.
据《广州日报》报道，近日，美国鱼类和野生动物管理局正式宣布东部美洲狮灭绝。
The US Fish and Wildlife Service declared the eastern cougar officially extinct Wednesday, even though the big cat is believed to have first disappeared in the 1930s.
美国鱼类和野生动物管理局在星期三宣布东部美洲狮已正式灭绝，但是人们认为这种大型猫科动物在20世纪30年代就消失了。
The US Fish and Wildlife Service declared the eastern cougar officially extinct Wednesday, even though the big cat is believed to have first disappeared in the 1930s.
美国鱼类和野生动物管理局在星期三宣布东部美洲狮已正式灭绝，但是人们认为这种大型猫科动物在20世纪30年代就消失了。
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