后来，大约在公元前7000年，在几代人的时间里，他们突然转向放牧家养的山羊和绵羊，转而种植单粒小麦、豆类和其他谷类牧草。

Then, about 7000 B.C., within the space of a few generations, they switched abruptly to herding domesticated goats and sheep and to growing einkorn, pulses, and other cereal grasses.

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采用适合离散函数的网格法研究小麦籽粒的长度、宽度、厚度、单粒质量等参数间的分形特性。

Fractional characteristics between length, width, thickness and weight of a single kernel were studied by using net method that adapted to the discrete function.

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