有胎盘哺乳动物

It is important in the formation of the umbilical cord and placenta in mammals.

对哺乳动物脐带和胎盘的形成有重要作用

Monotremes and marsupials are aplacental mammals .

单孔动物和有动物是无胎盘的哺乳动物。

Monotremes and marsupials are aplacental mammals .

类动物和有袋动物是无胎盘哺乳动物。

Monotremes and marsupials are aplacental mammals.

单孔类动物和有袋动物是无胎盘的哺乳动物。

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''。

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

Coronary artery bypass graft.all mammals except monotremes and marsupials are placental mammals.

除了单孔类动物和有袋动物之外所有的哺乳动物都是有胎盘的哺乳动物。

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。

Nothing much then happened for 50m years when, all of a sudden, the placentals (or, at least, those with surviving descendants) split into four so-called superorders.

之后的五千万年内没有任何新奇的事发生，就在这时，胎盘哺乳动物(或者说是那些有后代存活的哺乳动物)突然之间分化为四种所谓的生物总目。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。