| [00:01.557] | The mainland too, of course, had its burial chambers, like the long barrow at West Kennet. |
| [00:17.362] | And there were also the great stone circles. |
| [00:20.270] | The largest at Avebury，but the most spectacular of all at Stonehenge. |
| [00:35.820] | By 1,000 BC, things were changing fast. |
| [00:39.551] | All over the British landscape, a protracted struggle for good land was taking place. |
| [00:45.254] | Forests were cleared so that Iron Age Britain was not, as was once romantically imagined. |
| [00:51.179] | An unbroken forest kingdom stretching from Cornwall to Inverness. |
| [00:56.509] | It was rather a patchwork of open fields, dotted here and there with woodland copses giving cover for game, especially wild pigs. |
| [01:07.621] | And it was a crowded island. |
| [01:09.965] | We now think that as many people lived on this land as during the reign of Elizabeth 2,500 years later. |
| [01:18.777] | Some archaeologists believe that almost as much land was being farmed in the Iron Age as in 1914. |
| [01:31.421] | So it comes no surprise to see one spectacular difference from the little world of Skara Brae, great windowless towers. |
| [01:40.845] | They were built in the centuries before the Roman invasions. |
| [01:43.839] | When population pressure was at its most intense and farmers had growing need of protection. |
| [01:50.630] | First from the elements, but later from each other. |
| [00:01.557] | The mainland too, of course, had its burial chambers, like the long barrow at West Kennet. |
| [00:17.362] | And there were also the great stone circles. |
| [00:20.270] | The largest at Avebury, but the most spectacular of all at Stonehenge. |
| [00:35.820] | By 1, 000 BC, things were changing fast. |
| [00:39.551] | All over the British landscape, a protracted struggle for good land was taking place. |
| [00:45.254] | Forests were cleared so that Iron Age Britain was not, as was once romantically imagined. |
| [00:51.179] | An unbroken forest kingdom stretching from Cornwall to Inverness. |
| [00:56.509] | It was rather a patchwork of open fields, dotted here and there with woodland copses giving cover for game, especially wild pigs. |
| [01:07.621] | And it was a crowded island. |
| [01:09.965] | We now think that as many people lived on this land as during the reign of Elizabeth 2, 500 years later. |
| [01:18.777] | Some archaeologists believe that almost as much land was being farmed in the Iron Age as in 1914. |
| [01:31.421] | So it comes no surprise to see one spectacular difference from the little world of Skara Brae, great windowless towers. |
| [01:40.845] | They were built in the centuries before the Roman invasions. |
| [01:43.839] | When population pressure was at its most intense and farmers had growing need of protection. |
| [01:50.630] | First from the elements, but later from each other. |
| [00:01.557] | The mainland too, of course, had its burial chambers, like the long barrow at West Kennet. |
| [00:17.362] | And there were also the great stone circles. |
| [00:20.270] | The largest at Avebury, but the most spectacular of all at Stonehenge. |
| [00:35.820] | By 1, 000 BC, things were changing fast. |
| [00:39.551] | All over the British landscape, a protracted struggle for good land was taking place. |
| [00:45.254] | Forests were cleared so that Iron Age Britain was not, as was once romantically imagined. |
| [00:51.179] | An unbroken forest kingdom stretching from Cornwall to Inverness. |
| [00:56.509] | It was rather a patchwork of open fields, dotted here and there with woodland copses giving cover for game, especially wild pigs. |
| [01:07.621] | And it was a crowded island. |
| [01:09.965] | We now think that as many people lived on this land as during the reign of Elizabeth 2, 500 years later. |
| [01:18.777] | Some archaeologists believe that almost as much land was being farmed in the Iron Age as in 1914. |
| [01:31.421] | So it comes no surprise to see one spectacular difference from the little world of Skara Brae, great windowless towers. |
| [01:40.845] | They were built in the centuries before the Roman invasions. |
| [01:43.839] | When population pressure was at its most intense and farmers had growing need of protection. |
| [01:50.630] | First from the elements, but later from each other. |
| [00:01.557] | 当然，在大陆上同样建有墓穴，诸如西坎奈特长墓。 |
| [00:17.362] | 其他地方同样也有巨石圈。 |
| [00:20.270] | 其中最大的在埃夫伯里，而最为壮丽的，当数史前巨石阵。 |
| [00:35.820] | 公元前1000年前后，这里发生着天翻地覆的变化。 |
| [00:39.551] | 不列颠全境，进行着一场良田之争. |
| [00:45.254] | 森林被夷为耕地,以铁器时代的不列颠. |
| [00:51.179] | 已并非曾经那个坚不可摧的森林帝国,所领土自康奈尔绵延至因弗内斯。 |
| [00:56.509] | 更多的是一片片广阔的田野,星罗棋布的丛林穿插其间，为像野猪一样的动物们提供了一片乐土。 |
| [01:07.621] | 这还是一个拥挤的岛国。 |
| [01:09.965] | 现今普遍认为，当时这片土地上的人口，与2500年，后伊丽莎白一世时期一样多。 |
| [01:18.777] | 部分考古学家认为，铁器时代的耕地面积几乎与1914年一样多。 |
| [01:31.421] | 因此也就不必惊异于，斯卡拉布雷的这一奇特之处，巨大的无窗石塔。 |
| [01:40.845] | 罗马入侵数世纪前，它们就被筑造于此。 |
| [01:43.839] | 因为当时正是人口压力最重之时,而农民也日益需要加强自我保护。 |
| [01:50.630] | 之前是为对抗自然，后来则是互相防范。 |
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