Two people bump into each other on a side walk, and it's nobody's fault, just a complete accident.
两个人在路上不小心撞到了对方，谁都不是故意的，只是纯粹的一个意外。
What caused the accident is a complete mystery.
事故是由什么引起的完全是个谜。
What caused the accident is still a complete mystery.
造成这场事故的原因仍然是个谜。答案。
System is not complete, the accident is inevitable.
制度不全，事故难免。
What caused the accident is still a complete mystery.
事故发生的原因仍然是个不解之谜。
What caused the accident is still a complete mystery.
事故发生的原因仍然是个不解之谜。
应用推荐