| 1. | In some places the rock floor beneath the ice is 8, 000 feet below sea level .
冰层覆盖下的岩层在有些地方为海面下八千英尺深。 |
| 2. | Much of the northern lands were covered by vast ice sheets that reached a thickness of as much as 3 kilometers .
北方大陆的大部分地区曾为厚达3公里的大量冰层所覆盖。 |
| 3. | This would start the formation of ice sheets such as those that several times have flowed south across north america and eurasia .
这样就会开始形成像那些曾几度往南流过北美和欧亚大陆的冰层。 |
| 4. | And this shows the depth of the ice covering the ground
这显示了地上冰层的厚度 |
| 5. | The ice will break up when the warm weather comes
天气转暖，冰层就会破裂。 |
| 6. | Tyler : look . s lik . e the rebreather punched a hole through the ice
好像呼吸器把冰层撞穿了 |
| 7. | The sun soon thawed the ice on the river
太阳很快融化了河上的冰层。 |
| 8. | The southern ice sheet is over 2200 meters thick , on average
南部的冰层厚度平均超过2200米。 |
| 9. | The team collected ice samples and data on temperatures
探险队员们采集了冰层样本和温度数据。 |
