The ice breaker is a ship strong enough to break ice sheets covering a river or seawater. With the ice sheets broken to pieces, the fleet of vessels following the ice break...
(though they may also encourage a taste for portable goods of high value such as silks or jewelry). So, by and large, nomadism implies a high degree of self-sufficiency and inhibits the appearance of an extensive division of labor. Inequalities of ...
Katherine Flegal and colleagres at the US National Center for Health Statistics in Hyattsville,Maryland, have calculated that people kicking the habit have been respousible for a small but significant portion of the US epidemic of fatness.From data...
更多内容请点击：打破坚冰 Breaking the ice?