monotreme

英汉释义

• n.

  1.【动】单孔目动物

英英释义

• n.

  1.a mammal such as the duck-billed platypus or echidna that lays eggs and has a single opening for the discharge of feces and urine.

英汉例句

• 1.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。