No one knows for certain what happened, but it's a fair bet that it was not an accident.
没有人知道究竟发生了什么,但几乎可以肯定这并非意外。
Fortunately, the shouting woke up my wife who opened the window just as the policeman had started to climb towards me.
幸运得很,这喊声惊醒了我的妻子。就在警察开始向我爬上来时,她打开了窗子。