调整电位计直到不能从扬声器中听到嗡嗡声。 A: Adjust the potentiometer until you do not hear a hum from the loudspeaker. B: Adjust the potentiometer until the loudspeaker no longer hums.
调整电位计直到不能从扬声器中听到嗡嗡声。 A: Adjust the potentiometer until you do not hear a hum from the loudspeaker. B: Adjust the potentiometer until the loudspeaker no longer hums.
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