历史流变
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great changes of human history 人类历史重大变革
History of Changes 改变的历史记录
the history of changes 易学史
·2,447,543篇论文数据，部分数据来源于NoteExpress
The indicators are designed to provide early signals of turning points between the expansion and slowdown of economic activity, and are based on a wide variety of data series that have a history of signaling changes in economic activity.
WSJ: OECD Sees India Lagging Other Major Economies
China has a history of rapid changes in regulation of the phone business.
BBC: China Telecom US flotation 'delayed'
Most of the massive changes driving human history have been communications revolutions.
FORBES: What Will Be the Next Truly Revolutionary Technological Development?
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