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The common map has less, and the black-knobbed has a lot.
普通地图背上没有很多瘤子，但是黑瘤地图就有很多很大的瘤子。
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Any of various insects of the order Lepidoptera, characteristically having slender bodies, knobbed antennae, and four broad, usually colorful wings.
蝴蝶多种鳞翅目类昆虫，特征为身体细长，触须突出，有四个通常是彩色的宽大的翅。
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Room service: A red-knobbed hornbill arrives with breakfast, which he will regurgitate for his roughly three-month-old chick safely inside a nest hole in an Alstonia tree.
一只长有红色盔突的雄犀鸟带着早餐翩然而至。 雄犀鸟将会把食物反刍给它大约3个月大的雏鸟，雏鸟安全地在一棵鸡骨常山属树木的巢穴里。
词根 knob
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knobbly adj. 有节的；多疙瘩的；流行的；棘手的（等于knobby）
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knobby adj. 多节的；多瘤的；多疙瘩的
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knob n. 把手；瘤；球形突出物 vi. 鼓起 vt. 使有球形突出物
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knobble n. （树的）小节；小瘤，小疙瘩 vt. 从采出的石料中去除碎块
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knobkerrie n. 南非土人昔时用作武器的圆头棒