危险的迹象 meaning in Chinese

threat

There was a sign of danger in the sea . it warned us and we all went ashore
海里有危险的迹象。它提醒了我们，我们上岸了。
From the top , there is no clue of the danger that lurks around the bend , but i know
从顶上望过去，急流拐角处没有什么危险的迹象，但是我知道。
Investigators are searching for the remains of two news helicopters that crashed in phoenix killing four people . witnesses say neither aircraft appeared to be in distress before they collided
两架新闻采访直升飞机在凤凰城发生碰撞，四人死亡。调查人员正在寻找死难者的遗体。目击者称：两架飞机出事之前没有任何危险的迹象。