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。
As we had had a long walk through one of the markets of old Delhi, we stopped at a square to have a rest.
当我们穿过旧德里的市场时走了很长一段路,我们在一个广场上停下来休息。