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n.单孔目动物（monotreme的复数）
1、monotonic───adj.单调的；无变化的；产生单音调的
2、monotonous clue───单调的线索
3、monotonous means───单调的手段
4、monotonic transformation───[数]单调变换
5、monotreme───n.单孔目动物；单孔类动物
6、monotone───adj.单调的；vt.单调地读；n.单调；单音调
7、monotheistic religion───一神教
8、Monothelite───n.一志论派（基督教的一个派别）
9、monotheism───n.一神教，一神论
10、monotremata───n.[脊椎]单孔目
1、Today, this bizarre but fascinating creature is known as the platypus, one of only five extant monotremes (egg-laying mammals).───如今，这种怪诞但迷人的生物被命名为鸭嘴兽，现存的五种卵生哺乳动物之一。
2、The world's only monotremes are the platypus and the echidna.───鸭嘴兽和针鼹鼠是世界上唯一的单孔类动物。
3、The echidna is such a unique animal that it is classified in a special class of mammals known as monotremes, which it shares only with the platypus.───鼹鼠之独特，被定类为特殊的哺乳动物，属单孔类动物。单孔类动物只有针鼹鼠和鸭嘴兽。
1、The presence in monotremes of egg laying and other primitive traits from distant ancestors, such as reptilelike shoulders, is often offered as reasons for their apparent inferiority, Phillips says.
2、The echidna is such a unique animal that it is classified in a special class of mammals known as monotremes, which it shares only with the platypus.
3、The world's only monotremes are the platypus and the echidna.