S-3：see the red light 亮起红灯
A:John passed away.
A:约翰去世了。
B:When? I saw him well last month.
B:什么时候？上个月我见他还是好好的。
A:Yesterday. He suffered from a serious disease. When he saw the red light, it was to late.
A:昨天，他得了一种严重的病，当他意识到危险的时候已经太迟了。
B:How terrible!
B:真可怕！
