nut of any of several trees of the genus Corylus 同义词：filbert, cobnut, cob,
any of several shrubs or small trees of the genus Corylus bearing edible nuts enclosed in a leafy husk 同义词：hazel, hazelnut tree,
A hazelnut is the nut of the hazel and is also known as cobnut or filbert nut according to species. A cob is roughly spherical to oval, about 15?25?mm long and 10?15?mm in diameter, with an outer fibrous husk surrounding a smooth shell.
例句与用法
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These differences are not always as pronounced as among hazelnut varieties of different provenance . 这些差别未必象不同种源的榛子变种之间所表现的那样明显。
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