Information must be stored so that it is secure from accidental deletion.
必须把资料保存起来，这样才不至于无意中删除。
At least 10 000 children are involved in accidental poisonings every year.
每年至少有1万名儿童意外中毒。
I didn't think our meeting was accidental ─ he must have known I would be there.
我认为我们相遇不是偶然的——他肯定知道我要去那里。
We insure against all damage, accidental or otherwise.
我们的保险包括一切意外或其他损失。
His hand brushed against hers; it could have been either accidental or deliberate.
就在有意无意间，他的手轻轻拂过她的手。