我对他说他差一点造成一起恶性事故.

I told him that he had nearly caused a bad accident.

而LPG储罐容易受到人为因素和自然现象的影响而发生火灾、爆炸等恶性事故.

LPG tanks are easy to be fired and blasted under the human factors and natural phenomena.

该项技术的研究和应用，可以对发动机的磨损故障进行早期预报，避免恶性事故的发生。

The study and application of this method can make early failure prediction of engine and avoid serious fault.