About day four, we realized that there was nothing in this chamber but hominids.

大约在四天时候，们意识到，这间屋子里除了科动物，什么都没有。

By the 1950s, the number of named hominid types had risen to comfortably over a hundred.

到20世纪50年代，被命名种动物名称已达100种以上。

One area of paleoanthropological study involves the eating and dietary habits of hominids, erect bipedal primates—including early humans.

古类学研究一个领域涉及原（直立行走灵长类动物，包括早期类）饮食习惯。

In fact, in 2007, in the Siwa oasis, an early hominid footprint was discovered fossilized in the rocks.

事实上，2007年在锡瓦岩石中，发现了一个早期原始迹化石。

At no time since hominids first arose on Earth has Australia not been an island.

自从科动物一次在地球上出现以来，澳大利亚就一直是一块孤立陆地。

I found my first hominid — one-in-ten-million chance — my first day. It was completely — I was hooked.

发现了一个科动物化石——千万分之一机会——一天就发现了。完全被迷住了。

An upright hominid could see better, but could also be seen better.

直立行走科动物看得更清楚，但也被看得更清楚。

In addition, Homo erectus was the first hominid [HAH muh nid] to use fire.

此外，直立是一个使用火原始 [HAH muh nid]。

It has these very different hands than any kind of hominid we've ever seen before, with those long, curved fingers.

它手和们以前见过任何一种科动物手都不一样，有着又长又弯曲手指。

We know less about ourselves, curiously enough, than about almost any other line of hominids.

很有意思是，们对自己了解，少于对科动物几乎任何别分支了解。

To other hominids, Homo erectus must have seemed terrifyingly powerful, fleet, and gifted.

在其他科动物眼里，直立肯定显得个儿大、有力气、敏捷和有才干。

But, as early hominids expanded their group size, reciprocal grooming became too time-consuming.

但是，随着早期原始扩大他们群体规模，互惠梳理变得太耗时了。

The Asian hominids would have had to appear, as it were, spontaneously.

可以说，除非亚洲科动物是自发出现。

No persuasive reason has ever been adduced for why hominid brains suddenly began to grow two million years ago.

没有任何原因以说明为什，么200万年前科动物大脑突然开始增大。

But there is also an uncomfortable overlap with the rise of a certain hominid species originating in Africa 150,000 years ago.

另一个重效应就是15万年前某些原于非洲原始种进化。

The spacecraft gets her name from the Lucy fossil, an ancient human ancestor whose remains transform the study of hominid evolution.

“露西”号得名于“露西”化石，是古类祖先化石，其遗骸推进了对类进化研究。

This discovery helps us understand how early humans fit in with other hominid and animal species.

这一发现有助于们了解早期类如何适应其他原始和动物物种。

If we were hunter gatherers or ancient hominids, every one of them would probably be dead.

如果们是狩猎采集者或古代原始，他们每个都可能已经死了。

For a time, it appears, Homo erectus was the only hominid species on Earth.

在一段时期内，直立似乎是地球上惟一属。

Early archaic hominids first arrived in the area  we today call Thailand at least 500,000 years ago.

至少在 50 万年前，早期古类首次抵达们今天称为泰国地区。