| 单词 | breastbone |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔carina〕A keel-shaped ridge or structure, such as that on the breastbone of a bird or of the fused lower two petals of flowers of many members of the pea family.龙骨状突起，龙骨瓣：龙骨状脊或结构，如鸟的突出胸骨或豆科中很多植物的两片下层融合在一起的花瓣的龙骨状结构美国传统〔keel〕A structure, such as the breastbone of a bird, that resembles a ship's keel in function or shape.龙骨脊：一种在功能或形状上象船的龙骨的结构，如鸟的胸骨美国传统〔ratite〕Relating to or being any of a group of flightless birds having a flat breastbone without the keellike prominence characteristic of most flying birds.平胸鸟的：与一种平胸，没有一般飞翔性鸟类所特有的龙骨状突起的不会飞的鸟有关的；属于这一类鸟的美国传统〔wishbone〕The forked bone anterior to the breastbone of most birds, formed by the fusion of the clavicles.鸟胸的叉骨，如愿骨：大多数鸟胸骨前部的叉形骨，因锁骨合并形成的美国传统 |
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