Wéi / xiū / rén / yuán / fā / xiàn / zhuàn / sù / biǎo / de / zhǐ / zhēn / tū / rán / tíng / zhǐ / bú / dòng / le维修人员发现转速表的指针突然停止不动了。The mechanic found that the tachometer needle had suddenly stopped moving.