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。
The control signal of opening or closing door must be passive contact.
开关门控制信号必须是无源触点！
Being passive can make you feel like you have no control over a situation.
被动会让你感觉对一个处境没有控制。
At present, the solution can be attributed to passive compensation and active temperature control.
目前，解决方法可归结为被动补偿和主动温控两大类。
At present, the solution can be attributed to passive compensation and active temperature control.
目前，解决方法可归结为被动补偿和主动温控两大类。
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