VFR

例句：

1. 1. VFR stands for Visual Flight Rules, which are used by pilots to ensure safe takeoff and landing.
   VFR代表视觉飞行规则，飞行员使用它来确保起飞和着陆的安全。
2. 2.The VFR flight plan allows for a more relaxed approach to flying, as it does not require an instrument approach.
   VFR飞行计划允许更轻松的飞行方式，因为它不需要仪表飞行。
3. 3. When flying in VFR conditions, it is important to have a clear understanding of the local airspace and weather conditions.
   在VFR条件下飞行时，重要的是要清楚了解当地的空中空间和天气条件。