small densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae 同义词：platypus, duckbilled platypus, duck-billed platypus, Ornithorhynchus anatinus,
primitive fish of the Mississippi valley having a long paddle-shaped snout 同义词：paddlefish, Polyodon spathula,
having a beak resembling that of a duck; "a duck-billed dinosaur" 同义词：duck-billed,
例句与用法
1.
There are rare animals in australia , for instance , koalas and duckbills 澳洲有稀有动物，例如考拉熊、鸭嘴兽。
2.
Also called duckbill semi aquatic egg - laying mammal native to tasmania and southern and eastern australia 鸭嘴兽是半水栖卵生哺乳动物,原产于塔斯马尼亚岛和澳洲的南部及东部。
3.
Annie : duckbills can lay eggs and lactation as well . it has an animal ' s body , but has a duck ' s mouth . it is a rare animal . no wonder the australian like it 安妮:鸭嘴兽既能下蛋，又能哺乳，长着兽的身体，却有鸭的嘴巴，真是奇特，要不澳洲人这样喜爱它。
4.
The advantages and disadvantages of using duckbill valve in sea outfalls are discussed in this paper , and the suitable conditions to use duckbill valve in outfall are put forward 对排海工程中应用鸭嘴阀的利弊进行了分析，提出了鸭嘴阀在排海工程中的适用条件。
5.
That machine uses the different siot form to whet the round , can whet a side of straight line or the duckbill sides , the giass of different thicknesschooses to use the different to compiplete , process speed can adjust 该机使用不同的槽形磨轮，可磨直线圆边或鸭嘴边，不同厚度的玻璃选用不同槽宽的磨轮，集粗磨、精磨、抛光一次性完成，加工速度可调。
6.
Comparing the usage of duckbill valve with multi - port heads in fengpu outfall in shanghai it is concluded that whether or not duckbill valves shall be used in a sea outfall depends on the comprehensive analysis of the specific engineering conditions 结合上海市奉浦排海工程，对使用鸭嘴阀与多喷口喷头进行了比较，认为鸭嘴阀在排海工程中的使用与否应根据具体工程综合分析决定。
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