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

大约在第四的时候，我们意识到，这间屋子里除了人科动物，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，被命名的人种动物名称已达100种以上。

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

古人类学研究的个领域涉及原人（双脚直立行走的灵长类动物，包括早期人类）的饮食习惯。

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

事实上，2007年在锡瓦的岩石中，发现了个早期原始人的迹化石。

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

自从人科动物第次在地球上出现以来，澳大利亚直是块孤立的陆地。

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

我发现了我的第个人科动物化石——千万分之的机会——我第发现了。我完全被迷住了。

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

直立行走的人科动物看得更清楚，但也被看得更清楚。

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

此外，直立人是第个使用火的原始人 [HAH muh nid]。

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

它的手和我们以前见过的任何种人科动物的手都不样，有着又长又弯曲的手指。

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

很有意思的是，我们对自己的了解，少于对人科动物几乎任何别的分支的了解。

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

在其他人科动物的眼里，直立人肯显得个儿大、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，随着早期原始人扩大他们的群体规模，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，除非亚洲的人科动物是自发出现的。

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200万年前人科动物的大脑突然开始增大。

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

另个双重效应是15万年前某些原于非洲的原始人种的进化。

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，是古人类祖先的化石，其遗骸推进了对人类进化的研究。

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

这发现有助于我们了解早期人类如何适应其他原始人和动物物种。

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

如果我们是狩猎采集者或古代原始人，他们每个人都可能已经死了。

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

在段时期内，直立人似乎是地球上惟的人属。

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，早期古人类首次抵达我们今称为泰国的地区。