warning laser radar

例句：

1. 1. The police issued awarning about the danger of driving under theinfluence.
   警方发布了关于酒后驾驶危险的警告。
2. 2. He gave me a warning that Ishould not go alone to the party.
   他给我一个警告，让我不要单独去参加聚会。
3. 3. The doctor warned us about therisks of smoking and advised us to quit.
   医生警告我们吸烟的风险，并建议我们戒烟。