【句子】
Starting around 7000 B.C., and for the next four thousand years, much of the Northern Hemisphere experienced temperatures warmer than at present.
大约从公元前七千年开始，在四千年当中，北半球的温度比现在高。
【解析】
1.thousand
1)n.<数字>千 n.成千上万;许许多多
Thousands of spectators watched the sailing.
数千名观众观看了这次游艇比赛。
2)词汇搭配
one in a thousand无比优秀
a thousand and one一千零一,无数的...
a thousand to one一千对一
the thousand ills that flesh is heir to人生难免的痛苦,命运...
parts per thousand千分之一
2.hundred, thousand和million的用法说明
