gōng / chéng / shī / gēng / huàn / le / shè / bèi / zhōng / de / jī / guāng / èr / jí / guǎn / yí / qì / hěn / kuài / huī / fù / le / zhèng / cháng工程师更换了设备中的激光二极管,仪器很快恢复了正常。The engineer replaced the laser diode in the equipment, and the instrument soon returned to normal.