The ordered structures forming in two-dimensional space for another class of the reaction-diffusion systems are studied under the fixed boundary condition.

对另一类反应扩散系统，在固定边界条件下，在二维空间所形成的有序结构进行了研究。

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It is shown that the temperature wave can appear beyond spatiotemporal symmetry-breaking bifurcation at a certain constraint controlled externally and a fixed boundary condition for the model system.

研究结果表明，在一定参数值和固定边界条件下，反应体系经由时间-空间对称破缺分支能够产生温度波。

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The reason we think the past is fixed once and for all is that there is a boundary condition at the beginning of time.

原因就是，我们认为过去是曾经确定的，未来全部由自己把握是因为在时间的开始有一个界定的条件。

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