| 1. | Ifr - instrument flight rules
仪表飞行规则 |
| 2. | Ifr instrument flight rules
计器飞行方式 |
| 3. | Vfr visual flight rules
有视界飞行方式 |
| 4. | Vfr visual flight rule
目视飞行规则 |
| 5. | Visual - flight rule
目视飞行规则 |
| 6. | A civil aircraft performing instrument flight shall observe instrument flight rules
进行仪表飞行的民用航空器，应当遵守仪表飞行规则。 |
| 7. | The flight was conducted under special visual flight rules , which require the pilot to remain clear of cloud and in visual contact with the surface
该次飞行是按照特殊目视飞行规则进行；根据该规则，飞行员须一直离开云层并能目视地面。 |
| 8. | A civil aircraft performing visual flight shall observe visual flight rules and keep a safe separation from other aircraft and ground obstacles
进行目视飞行的民用航空器，应当遵守目视飞行规则，并与其他航空器、地面障碍物体保持安全距离。 |
| 9. | Pilots fly under “ visual flight rules ” ? they file a flight plan with a local flight service station , navigate by altimeter and visual cues , and stay out of controlled airspace
驾驶员按照目视飞航规则飞行，也就是先向区域性的飞航服务站提出飞行计画书，然后利用高度计和目视地标航行，并且不能进入飞航管制的空域。 |
| 10. | The concepts and philosophy of multithreaded programming technology are presented in this paper , and an example about scheduled - flight rules check - up in scheduled flight optimization system is given to explain the multithreaded programming method
分析了线程和多线程程序设计的概念和基本思想，并结合在航班优化系统中航班规则检查的应用实例，说明了多线程程序设计的实现方法。 |
