accident alarming

例句：

1. 1.The accident was caused by a sudden drop in the temperature.
   这场事故是由于温度突然下降引起的。
2. 2. He was an accidental witness to the crime.
   他是这起犯罪案件的偶然目击者。
3. 3. The accidental spill of oil on the floor led to a fire.
   油不慎洒在地板上引发了火灾。