evolution law of river channel 河床演变规律
evolution of river channel 河道演变
Another possible channel of evolution is gene duplications.
另外一个可能的基因进化过程则是基因的复制。
A physical model of nonlinear evolution of chaotic signal propagation in optical fiber is presented by coupling chaotic laser system with optical fiber channel.
通过耦合激光混沌系统和光纤传输信道，提出光纤混沌信号传输的非线性演化物理模型。
Severe plastic deforming behavior and microstructure evolution of two phases in medium-carbon steel during equal channel angular pressing (ECAP) were investigated by experimental method.
用实验方法研究了中碳钢两相组织在等通道角挤压过程中的强烈塑性变形行为和组织演化过程。
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