铁铧
铁铧-
首先，我们在这里初次看到了带有铁铧的用牲畜拉的犁；有犁以后，大规模耕种土地，即田间耕作，从而食物在当时条件下实际上无限制地增加，便都有可能了；
Above all , we now first meet the iron plowshare drawn by cattle , which made large-scale agriculture , the cultivation of fields , possible , and thus created a practically unrestricted food supply in comparison with previous conditions .