在很长的一段历史时期内，成为中华古代文明的主要发祥地和根据地。
For quite a long period, the Yellow River Valley has been the major birthplace and base of the ancient civilization.
图书盗版是盗版的传统形式，在相当长一段历史时期内一直是我国盗版现象的主要表现形式。
Book piracy is traditional form of the pirate and also the main form of expression of the pirated phenomenon during a quite long historical period in our country.
在很长一段历史时期里，当朋友送礼物或款待自己时，有礼貌的人会回报朋友的关心和好意。
For a long time in history, people of good manners would return favors and kindness when receiving a treat from a friend.
由于主题本身范围宽泛并涵盖了很长一段历史时期，所以你需要对选择作为报告内容的信息有所区别。
The themes themselves are very broad and cover a long period of time, so you will need to exercise some discrimination in the information you choose to present.
从某种意义上来讲，延安不仅仅是一个地名，更多地它负载着一段深厚而又艰辛的历史，更是一个历史时期及其文化的独特象征。
In some senses, Yan 'an was not only a place, but also a bearer of a episode of profound and hard history, also a unique symbol of specific historical period and of its culture.
中古（约3-9世纪）时期是中国古代史中一段特殊的历史时期，而佛教的兴起与繁荣则是这一时期最显著的特点之一。
The middle ancient (about from 3 to 9 century) is a special ere of Chinese ancient society, the Buddhism was one of the best out standing characteristics of the time.
中古（约3-9世纪）时期是中国古代史中一段特殊的历史时期，而佛教的兴起与繁荣则是这一时期最显著的特点之一。
The middle ancient (about from 3 to 9 century) is a special ere of Chinese ancient society, the Buddhism was one of the best out standing characteristics of the time.
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