Utilizing piezoelectricity, the structure vibration can be effectively controlled by active or passivemethod.
利用压电效应能够对结构振动进行有效的主动和主被动控制。
2
Bear in mind, of course, that lurking is a valid method of participation, albeit passive.
但要记住，偷看也是一种有效的被动参与方法。
3
Before the use of CFD, computer-generated special effects such as explosions were driven by force fields applied to passive unconnected particles, a method that produced rather unrealistic results.