英语听力：探索发现 2012-09-09 长毛象王国 Mammoth—1
时间：2019-01-23 作者：英语课 分类：探索与发现2012年
英语课
21st century, North America, where people have reached even the remotest corners of the continent, and pushed back the boundaries 1 of modern technology.
But it isn’t so long since humans first set foot here about 14,000 years ago. And back then, North America belonged to other creatures of the size to match this vast 2 land, giants whose lives are now lost in the shadows.
Imagine if we could travel back in time to the end of the last ice age, long before the first city was born, to look through the eyes of the very first people, and experience a wild new world.
In this series 3, we will take you on a journey back into the past to build a picture how things were at the end of the last ice age, 14,000 years ago.
n.分界线( boundary的名词复数 )；范围；使球越过边界线的击球（得加分）；疆界
- Country boundaries are shown on this map as dotted lines. 这张地图上国界以虚线标出。
- The boundaries of that country were changed by a treaty. 那个国家的边界根据条约有所更动。 来自《简明英汉词典》
adj.巨大的，庞大的；大量的，巨额的
- Tom has made a vast improvement in his German.汤姆的德语有了很大的进步。
- China has a vast territory and a large population.中国地域辽阔，人口众多。