... thighs 大腿 wing covert 体外的大型羽片(廓羽) feet 脚爪 ...
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翼覆羽
Wing Covert Feather 翅膀隐羽
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N any of the covert feathers of the wing of a bird, occurring in distinct rows (鸟翼的)复羽
Wing covert feather, flight, Institute of Zoology and Zoological Museum, University of Hamburg.
翅膀隐羽，飞行用，汉堡大学动物学会和动物博物馆。
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Kennan gave counsel to the Administration during the Korean War, and was instrumental in setting up the covert-operations wing of the Central Intelligence Agency.
NEWYORKER: Getting Real
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