zài / jiǎn xiū / zhè / kuài / diàn lù bǎn / shí / gōng chéng shī / xiān / cè liáng / piān zhì diàn zǔ / liǎng duān / de / diàn yā在检修这块电路板时,工程师先测量偏置电阻两端的电压。When servicing this circuit board, the engineer first measures the voltage across the bias resistor.