| 单词 | 四趾 |
| 释义 | 〔tetradactylous〕Having four digits or claws on each extremity.四趾动物的：每个肢端有四趾或爪的〔tamandua〕Either of two small nocturnal anteaters(Tamandua tetradactyla or T. mexicana) of Central and South America, having thick, bristly fur and dwelling in trees during the day. 四趾食蚁兽：生活于中南美洲的两种在夜间活动的小型食蚁动物（四趾食蚁兽 或 墨西哥食蚁兽） 中的一种，长有浓密坚硬的皮毛，白天栖息在树上 〔eohippus〕A small, herbivorous, extinct mammal of the genusHyracotherium (or Eohippus ) from the Eocene Epoch of the western United States, having four-toed front feet and three-toed hind feet and related ancestrally to the horse. 始祖马：始新世产于美国西部的一种属于蹄兔 （或 始祖马 )属的哺乳动物，已灭绝，体型小，食草，前蹄四趾，后蹄三趾，为马的远祖 〔hyracothere〕A small herbivorous mammal of the genusHyracotherium (syn. Eohippus ) from the Eocene Epoch of North America, having four-toed front feet and three-toed hind feet and related ancestrally to the modern horse. 始马：北美洲始新世始马属 （与 始祖马属 同义）的小型草食性哺乳类，其前脚为四趾后脚为三趾，与现代马有血缘关系 |
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