模仿织体。 即低声部以自由模仿上声部的旋律而构成双声的迭置。
Imitative Songs. a low voice imitates the melody of a high voice, and they overlap.
由于环境温度对声表面波质量传感器性能影响较大，因此采用新型的Y型双声路结构克服环境温度对传感器性能的影响。
As the characteristics of SAW sensor are greatly influenced by temperature, Y-type dual path structure SAW mass sensor is used to reduce its temperature effects.
PA系列功放设置三种工作状态：双声道，并联，桥接可以根据不同的场合选用。
Pa series amplifiers feature 3 kinds of operating states: double-channel, parallel, and bridging. They are selectable according to different situations.
应用推荐