They knew the techniques for grafting and improving, and domesticating species of grapes and olives particularly.

他们知道植物嫁接和改良的工艺,和为葡萄和橄榄培育良种的技术

耶鲁公开课 - 古希腊历史简介课程节选

Serfs who are compelled to work the land, or in some places even slaves, well, they have no incentive, put aside the question even of capacity, to invest capital for the purpose of improving the size and quality of the their crops, their trees, their vines.

那些被强迫耕种土地的农奴,或者是那些在其他地方直接成为奴隶的人,刨除能动性因素,农场主们,没有任何理由投资钱财,去改善他们农作物,果树和葡萄,的种植规模和品质

耶鲁公开课 - 古希腊历史简介课程节选