They learned to increase the yield and multiply the number of varieties. 他们学会了提高产量 种植多样化

261. The memory of thousands of years scrabbling for food faded.
     数千年来挣扎求食的记忆已经淡去
262. They learned to adapt the grains that are the yeast of life...
     他们学会了在不同的土壤和气候下
263. To different soils and climates.
     种植赖以生存的谷物
264. They learned to increase the yield and multiply the number of varieties.
     他们学会了提高产量 种植多样化
265. Like every species on earth,
     像地球上所有物种一样
266. The principal daily concern of all humans...
     所有人类日常首要关心的
267. Is to feed themselves and their family.
     就是养活自己和家人

来自《家园 第一部分 Home Part1》第 264 行