价格变动一般随供求变化而变化.

Changes in price normally vary with changes of supply and need.

定义了供求变化模式，研究了该模式中参数的选择对系统动态特性和鲁棒性的影响。

The demand and supply change mode is defined, and the influences of parameters on the dynamic characteristic and robust stability of the system are discussed.

对价格随供求变化的竞争扩散系统的捕获模型中扩散和捕获并存的情形进行了分析。

Harvesting model with price changed with demand and supply of the competitive diffusive system is analyzed deliberately when diffusion and harvesting exist in the model simultaneously.

研究具有扩散的竞争生物系统，建立了价格随供求变化的经济捕获模型，并对模型进行了详细分析；

Harvesting model with the price changed along with demand and supply is established for the competitive diffusive system.

关于人民币汇率形成机制的改革，我们汇率的形成是依照市场供求变化，并参照一篮子货币加以确定。

As for the reform of the RMB exchange rate system, the exchange rate of the RMB is determined by market supply and demand and with reference to a basket of currencies.

关于人民币汇率形成机制的改革，我们已经确立了汇率的形成是依照市场供求变化，并参照一揽子货币加以确定。

As for the reform of the RMB exchange rate system and I think now the exchange rate of the RMB is already determined based on market supply and demand with a reference to a basket of currencies.