| 单词 | 燕雀类 |
| 释义 | 〔swallow〕Any of various small, graceful, swift-flying passerine birds of the family Hirundinidae, having long, pointed wings, a usually notched or forked tail, and a large mouth for catching flying insects and noted for their regular migrations in large numbers, often over long distances.燕子：燕科体小、优美且飞行快疾的燕雀类小鸟，具有长而尖的翅膀、通常为V形或叉形尾巴和用于抓飞虫的大嘴，并因它们长距离的规律性集体大迁徙而闻名 |
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