His face was grave as he told them about the accident.
他把事故的经过告诉他们的时候，脸上的神情很严肃。
2
Due to collapse accident of main chute took place in Xincheng Gold mine, the ore lifting system of main shaft was paralysed which caused grave effect on mine operation.
新城金矿主溜矿井曾发生塌落事故，造成了主竖井矿石提升系统的瘫痪，严重影响了矿山生产任务的完成。
3
Accident means grave crisis to any organization or enterprise.