轮廓调制结合了一种相位调制信号的波形和放大器的输出阻抗，可在某个较大型输出电源关闭后保持更高的效率。

Contour modulation is a technique in which a phase-modulated signal waveform and amplifier output impedance work together to maintain higher efficiency over a sizable output power back-off.

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当电源调制和轮廓调制协同工作时，功率放大器的动态范围和效率可以进一步提高。

When supply modulation and contour modulation are working in concert, the dynamic range and efficiency of the power amplifier can be further improved.

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将顶层阁楼与下面的房子进行隔热，将门窗漏风处都堵好，如果这些措施得当，将会大大地提高空调制冷与制热系统的工作效率。

Properly insulating your attic and sealing any leaks under doors or around windows, will greatly improve the effectiveness & efficiency of your both cooling AND heating systems.

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