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1.The fruit of an oak, consisting of a single-seeded, thick-walled nut set in a woody, cuplike base.
橡树果实为木质,包着的单一种子,厚壁的坚果收藏指正
2.The cup-shaped cavity at the base of the hipbone into which the ball-shaped head of the femur fits.
髋臼髋骨基的空腔,股骨头置于其中收藏指正
3.A small cup-shaped structure or organ, such as the cup at the base of an acorn or one of the suckers on the feet of certain flies.
形器具一种小型的结构或器官,如橡树果实茎物或位于某些苍蝇脚上的吸盘之一收藏指正
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