gēng / huàn / piān / zhì / diàn / zǔ / hòu / fàng / dà / qì / de / gōng / zuò / zhuàng / tài / biàn / de / wěn / dìng / le更换偏置电阻后,放大器的工作状态变得稳定了。After the bias resistor was replaced, the amplifier's operating state became stable.