It may have developed independently, but many scholars believe that the spread of agriculture and iron throughout Africa linked it to the major centers of the Near East and Mediterranean world.
它可能是独立发展起来的,但许多学者认为,农业和铁器在整个非洲的传播将非洲与近东区域和地中海区域的主要城市中心联系了起来。
The keystone is pulse power control components developed independently and software based on IPC.
着重点在自主开发的脉冲电源控制部件和基于IPC的软件上。
Fenugreek gum was a new generation of galactomannan gum, which was developed independently by China.
胡芦巴胶是我国自主研制开发的新一代半乳甘露聚糖胶。
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