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Souce of food
食物的起源
Since the introduction of agriculture，grains of cultivated crops have become the main source of man's staple food.
从引进农业以来，栽培作物的谷粒成为人类基本食物的主要来源。
Farming began to take up most of man's labor and time. Cultivation of crops was a process of man's work from sowing， applying fertilizer to harvest. It was the most important work in people's mind that could not be replaced by anything else.
农耕开始占据人类的大部分劳力和时间。农作物的耕作是从播种、施肥到收获的一系列人类劳动。它成为了人们心中不可替代的最重要的事情。
Growing crops was not the only way of obtaining food.
但是种粮食不是收获食物的唯一方式。
The ancients began expanding their sources of food at a very early time，developing farming，forestry，animal husbandry， sidelines，and fishing in line with local conditions.
人们很早就开始根据当地的条件扩展食物的来源，发展农业、林业、畜牧业、副业和渔业。
