The police know of no single thing that has caused the outbreak.

警方知道引起激变的原因无独有偶。

youdao

In fact, as far as we know, there is no such thing as a single force.

事实上就我们所知，根本不存在单个力这样的事。

youdao

In fact, as far as we know, there is no such thing as a single force.

事实上就我们所知，根本不存在单个力这样的事。

youdao