单孔目哺乳动物

基本解释 (translations)

echidnas

与单孔目哺乳动物相关的网络例句 [注：此内容来源于网络，仅供参考]

Modern mammals divide into three overarching groups: the placentals, the marsupials and the monotremes (the egg-laying platypus and echidnas).

现代哺乳动物可被划分为三种主要的群体：胎盘哺乳动物(大多数物种都属于这一类，包括人类)、有袋动物与单孔目动物。

Having no placenta, as marsupials and monotremes.

无胎盘的无胎盘的，如有袋目哺乳动物和单孔目动物

The monotremes split off about 166m years ago and the marsupials parted company with the placentals 148myears ago. That, however, was not news; the fossils tell a similar story.

在一亿六千六百万前单孔目动物就出现了物种分化且有袋动物脱离群体，而胎盘哺乳动物在一亿四千八十万年前出现类似情况。