The performance of the depression mood grave, behavior, suppression, thinking slow and so on, these is a kind of passive state.
抑郁症表现的情绪低沉，行为抑制，思维迟钝等，这些都是一种消极的状态。
2
Noise suppression is classified into two classes: Passive Noise Control and Active Noise Control.
噪声抑制方法可以分为两大类：被动噪声抑制和主动噪声抑制。
3
Unless we have made necessary and sufficient preparations against a planned enemy "encirclement and suppression" campaign, we shall certainly be forced into a passive position.