by accident 偶然地,无意中。
by accident of 因为??的机会,由于??的运气。
without accident 平安无事地。
have an accident 发生事故。
accident-prone (通常因为笨拙而)易出事故的,易遭意外的。
accidents will happen (事故发生后说的安慰话)出事是难免的。
例句:
I delete the file by accident.我不小心删掉了那个文件。
The play was a success more by accident than design.这部剧的成功与其说是演得好,不如说是运气好。