ASF

例句：

1. 1. The ASFC is a professional organization for pilots in the United States.
   美国固定翼飞行员协会是一个为在美国的飞行员提供专业服务的组织。
2. 2. He has been an active member of the ASFC for over ten years.
   他已经是ASFC的活跃成员超过十年了。
3. 3. The ASFC provides training and certification for commercial pilots.
   ASFC为商业飞行员提供培训和认证。