1. The fire was purely accidental.

这场火灾纯粹是意外发生的。

2. the accidental suffocation of babies by people sleeping in the same bed

由同床睡觉者造成的婴儿意外窒息死亡

3. While the government said the fire was accidental, residents of the town alleged it was the handiwork of the security forces.

虽然政府说这场火灾是个意外，但镇上的居民却声称这是安全部队所为。

4. He died from a suspected accidental overdose of sleeping tablets.

他被怀疑是因为意外服用过量安眠药而去世的。

5. The coroner recorded a verdict of accidental death.

验尸官裁定是意外死亡。