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1·The newest era is called Cenozoic beginning at 65 million years ago. It is the age of Mammals.

最新的一个代叫做新生代，它是从距今6500万年的时候开始的，这个时期是哺乳动物的时代。

2·We talk about the age of dinosaurs or the age of mammals, but since the first animal climbed onto land, every age has been, by any reasonable measure, the age of insects too.

我们也许还在津津乐道于恐龙时代或哺乳动物时代，但殊不知第一只动物爬上陆地时，昆虫的时代也已然来临。

3·You probably remember that human infants are less developed physically than other mammals of the same age.

你可能还记得，同龄人类婴儿的身体发育不如其他哺乳动物。

4·Such protection against fungal infection, Dr. Casadevall has speculated, could have been crucial for the triumph of mammals following the age of dinosaurs.

卡萨·德沃尔博士推测，较高的体温对真菌感染的天然屏障，可能是哺乳动物们在恐龙灭绝之后一直繁衍到今天的关键原因。

5·Satao's death at the age of around 45 years is the latest in a massive upsurge of poaching of the mammals for their ivory across the African continent.

45岁萨韬的死亡只是非洲大陆上为了象牙而大肆猎杀大象现象中的最近一例。

6·For all the ape fossils, stoneware, and fossil of mammals unearthed at the Peking Man Site, other sites of the same age are not its match regarding quantity and miscellany of fire remains.

在周口店北京人遗址出土的猿人化石、石制品、哺乳动物化石种类数量之多以及用火遗迹之丰富，都是同时代其它遗址所无法相比的。

7·Dietary restriction effectively extends lifespan in mammals and decreases the incidence and progression of many age-dependent diseases.

饮食限制有效延长了哺乳动物的寿命，也使许多年龄依赖性疾病的发病率降低且延缓其进展。