For example, as the great ice sheets that covered North America during the last ice age steadily melted away, huge volumes ofwater flowed from them.
例如,随着覆盖北美的大冰原在最后一个冰河时代逐渐融化,大量的水从冰原流出。
2
When an ice age begins, the continental ice sheets grow, steadily reducing the amount ofwater evaporated from the ocean that will eventually return to it.
当冰河时代开始时,大陆上的冰原逐渐增大,从海洋中蒸发出来的水逐渐减少,而这些水最终又会回到陆地上。
3
At the ageof seven, he started by pulling his red wagon around his neighborhood collecting bottled water and supplies.