With an amplifyingdevice like a microphone, the speaker can use a natural tone.
有了麦克风之类的扩音装置，演讲者就可以使用自然的音调。
2
The utility model relates to a double-way pumping source pulse optical parameter oscillating amplifyingdevice.
本实用新型涉及一种双向泵浦脉冲光参量振荡放大装置。
3
The second amplifyingdevice is connected to the summing node via an output matching circuit and a second impedance transformer containing a transmission line.