| 释义 |
〔kittiwake〕Either of two cliff-nesting gulls(Rissa tridactyla or R. brevirostris) of northern regions, having a rudimentary hind toe. 三趾鸥：后趾已退化的在悬崖筑巢的鸥（三趾鸥 或 红脚三趾鸥） ，居住在北部地区 〔hallux〕A homologous digit of a bird, a reptile, or an amphibian. In birds, it is often directed backward.后趾：鸟、爬行动物或两栖动物类似的一个趾头，对鸟而言它通常向后 |