primitive fish of the Mississippi valley having a long paddle-shaped snout
small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae
Adjective:
having a beak resembling that of a duck;
\\\"a duck-billed dinosaur\\\"
造句
用作名詞(n.)
New evidence, however, challenges that theory.The duckbill platypus, it turns out, gets about eight hours of REM shuteye a day. 新證據向上述觀點提出挑戰，它推翻了鴨嘴獸一天睡眠八小時的理論。