| 单词 | 龙骨状突起 |
| 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〔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 |
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