In Neolithic period, primitive types of agriculture were done.

原始的农耕形式在新石器时代宣告终结。

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Early in the period of primitive clan commune, there was a famous myth about the origin of the Tujia people--- a tribe header's meeting with a goddess.

早在原始氏族公社时期，这里就上演了一幕“廪君盐阳会女神”悲壮之歌。

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Some typical works of art and design of primitive society were studied and analyzed, and the dialectic relations between art and design during this period were discussed.

论文研究分析了原始社会典型的艺术与设计作品，探讨了该时代背景下艺术与设计的辩证关系。

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But as nuclear and missile technology has proliferated in the post-Cold War period, and more technologically primitive countries get their hands on missiles and limited nuclear capabilities, the threat of an EMP attack as become far more acute.

CENTERFORSECURITYPOLICY: An urgent memo to the next government