哺乳类

In regard to animals, Diphyodont evolved into Reptilia, which evolved into mammals.

动物是由两栖化为爬虫，再化为哺乳类。

Most mammals are diphyodonts.

大部分哺乳类动物有乳齿及永久 齿之别。

Last December scientists announced the probable extinction of the first mammal because of climate change: the white lemuroid possum, now gone from Queensland, Australia.

2008年12月，科学家宣布第一个可能因迁而灭绝哺乳类：白狐猴负鼠，已经从澳洲士兰消失了。

Despite being the basal member of the cynodont clade, they already showed some of the advanced mammalian characteristics, but Procynosuchids bore resemblance to the Therocephalians.

即使原犬鳄龙科很原始，牠们已有哺乳类特徵。原犬鳄龙科外表与兽头亚目动物有点类似。

LDH-C4 is specific to mature testes and spermtozoa of bird and mammal.It is related to metabolic processes that provide energy for motility and survival of spermtozoa.LDH-C4 is an autoantigen.

摘要精子特异性乳酸脱氢酶特异地存在于鸟类和哺乳类动物成熟睾丸和精子中，为精子运动和存活提供能量。