The bomb exploded without any prior warning.

【prior】没有任何预先警告炸弹就爆炸了。

The FBI director James Comey told the congress the organization would look into prior warnings about Ahmad Khan Rahami which had received from his father.

FBI局长詹姆斯·科米(James Comey)告诉国会他们会深入调查艾哈迈德·汗·拉哈米的父亲此前提出的警告。

Fortunately with the advantage of modern prior warning systems authorities are able to keep the chaos to a minimum. Regardless, some sectors of the population still ignore the warnings.

所幸的是，由于有了先进的预警系统，当局能够将这种混乱不堪的状况降到最低限度。但不管怎样，还是有一部分人忽视这些警告。