... kangaroo袋鼠 4 bandicoot袋狸 5 koala考拉 monotremes单孔目动物 platypus鸭嘴兽 8 echidna针鼹 ...
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同义词： egg-laying mammal
以上来源于: WordNet
N any mammal of the primitive order Monotremata, of Australia and New Guinea: egg-laying toothless animals with a single opening (cloaca) for the passage of eggs or sperm, faeces, and urine. The group contains only the echidnas and the platypus (澳大利亚和新几内亚)单孔目哺乳动物
I would dream to do this in a monotreme, to find out if we could have a narcoleptic platypus.
我梦想能在单孔目动物上进行此类研究，看能否改造出一只发作性睡病的鸭嘴兽。
The Australian short-beaked echidna, a monotreme, is one of the oldest living mammals on earth.
澳大利亚短吻针鼹，一单孔类动物，是现存最古老的地球上的哺乳动物之一。
The genetic sequence of this Aussie monotreme (a type of mammal) is detailed in the May 8 issue of the journal Nature.
这只澳洲单孔目动物（哺乳动物的一种）的基因序列公布在5月8日出版的《自然》杂志上。
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