Strategy 模式可用于实现操作的可变性，Decorator 模式可用于实现参数的可变性。

The Strategy pattern can be used to implement operations' variability, and the Decorator pattern can be used to implement parameters' variability.

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可变成本由使用可用生产量产生。

Variable costs result from using available capacity.

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而且，可以发送增益值，它可用来控制在8-PSK操作期间的收发信机中的可变增益放大器（VGA）。

Furthermore, a gain value may be sent which may be used to control a variable gain amplifier (VGA) within the transceiver during 8-PSK operation.

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