Actually, in my analogy, the rapids are the periods of marketplace transformation.
事实上，按照我的类比，“急流”就是市场转变时期。
The lifecycle of enterprise knowledge includes the periods of pregnancy, growth, maturity and decay, and there are knowledge flow and transformation in each period.
企业知识生命周期包括孕育期、成长期、成熟期和衰退期，每个时期都存在知识流动与转换。
Based on the Kirchhoff scalar diffraction theory, the principle to choose sampling periods in the input plane, output plane and transformation function was analyzed in detail.
基于基尔霍夫标量衍射理论，详细分析了输入、输出平面及变换函数抽样间距的选取原则。
The riverbed form in different periods from 1958 to 2005 of the South Channel and the South-North-Passage bifurcation and the cross-section transformation between U-shape and W-shape are analyzed.
分析了1958~2005年不同时期长江口南港及南北槽分汊口的河床形态特征，以及河床U形断面与W形断面的相互转化。
Compared with periods of cultural steadiness, those of cultural transformation usually reveal the following characteristics:1)cultural pluralism;
相对于文化稳定期，文化转型期通常表现出以下特征：1文化多元化；
Compared with periods of cultural steadiness, those of cultural transformation usually reveal the following characteristics:1)cultural pluralism;
相对于文化稳定期，文化转型期通常表现出以下特征：1文化多元化；
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