I must have been blind not to realize the danger we were in.

　　當時我一定是眼瞎了，竟然沒有意識到我們所處的危險。

　　Only if the red light comes on is there any danger to employees.

　　只有紅燈閃亮時才有危及職工的險情。

　　Smoking is a serious danger to health.

　　吸煙嚴重危害健康。