The first " Americans" crossed the land bridge from Asia.

第一批美洲人来自亚洲。

They migrate across the land bridge into Asia, jump over into Europe.

他们跨过陆桥，进入亚洲，然后进入欧洲。

At that time, the Andaman Islands were connected to modern-day Myanmar by a land bridge.

当时，安达曼群岛通过一座大陆桥与今天的缅甸相连。

There's no evidence that there was this huge land bridge across the Atlantic.

没有证据表明，有一座巨大的陆桥横跨大西洋。

Sometime after 4 million years ago, ancient equid species began trotting across the Bering land bridge.

在 400 万年前的某个时候，古老的马科物种开始穿越白令陆桥。

That was a few thousand years before rising sea levels covered the Bering land bridge between Asia and North America.

在那之后几千年，海平面才上升覆盖亚洲和北美之间的白令大陆桥。

IT CAME WITH THE LAND BRIDGE AND SURVIVED THE CHANGES.

它与陆桥一起出现并在变化中幸存下来。

So they decided that Indians had reached North America by some unknown land bridge.

因此他们断定印第安人是通过某个未知的陆桥到达北美的。

Ancient texts describe how Prince Rama had the land bridge built to reach his wife across the sea.

古代文献描述了拉玛王子如何建造陆桥以跨海到达他的妻子。

This island -- now known as Wrangel Island -- was once connected to Siberia by land bridges and ice shelves.

这个岛——现在被称为弗兰格尔岛——曾经通过陆桥和冰架与西伯利亚相连。