One, some fantastic feeling, clean sound, the call of virginity, on separated on alone, about childhood, about displacement.
一听下，有些梦幻的感觉，干净的声音，童贞的呼唤，关于失散，关于独处，关于童年，关于流离。
2
The equation of displacement wave and sound pressure wave in the sound velocity experiment are derived. And their relation is analyzed.
推导了声速测定实验中合成声场的位移波动方程、声压波动方程以及两者之间的关系。
3
Controlling the volume displacement of vibration plate has previously been shown to be a good strategy to reduce its overall sound radiation at low frequency.