1·It was an unfortunate accident.
那是一次不幸的事故。
—— 《牛津词典》
2·Was an unfortunate accident.
是一个不幸的意外。
3·Suffered an unfortunate accident.
遭遇到不幸的事故。
4·Very unfortunate accident.
很不幸的意外。
5·This unfortunate accident happened because a wall.
这次不幸的事件起因是一面墙。
6·By that time everyone will have forgotten this unfortunate accident.
不过那时人们早就忘却这起不幸的事件了。
7·By an unfortunate accident the actor was stabbed in reality, and not merely in show.
由于一次不幸的意外事故，那位男演员不仅仅是在表演遇刺，而是真正被刺伤了。
8·I am referring to that unfortunate accident the other day, when I was knocked off my bike by a taxi.
我指的是那天我被一辆出租车从自行车上撞下来的不幸事件。
9·What this means is that there are a lot of people trying to make money on this unfortunate accident.
不幸的事件却成为许多人赚钱的原动力。
10·But this is an unfortunate accident, which, even if it had no bad effects, does not alter the principle.
但这不是不幸的意外，在此，即便它没有不良的影响，也不会改变原则。