front sight

例句：

1. 1. The driver needs to adjust the front sight to see clearly.
   司机需要调整前视镜以便看得清楚。
2. 2. The car has a large rear view mirror for better visibility.
   这辆车有一个大的后视镜，以便有更好的视野。
3. 3. The pilot adjusted the front sight to compensate for the wind.
   飞行员调整了前视镜以补偿风的影响。