saluting gun

例句：

1. 1.The soldier saluted the flag with his cap.
   士兵用帽子敬礼。
2. 2. The policeman used his gun to stop the car.
   警察用枪制止了那辆车。
3. 3.The soldiers saluted the general as he passed by.
   士兵们向他敬礼，将军经过时。