雅思阅读辅导：飞行规则的选择　　阅读段落 　　The FAA then recognized two types of operating environments.
In good meteorological conditions, flying would be permitted under Visual Flight Rules , which suggests a strong reliance on visual cues to maintain an acceptable level of safety.
Poor visibility necessitated a set of Instrumental Flight Rules , under which the pilot relied on altitude and navigational information provided by the planes instrument panel to fly safely.
On a clear day, a pilot in controlled airspace can choose a VFR or IFR flight plan, and the FAA regulations were devised in a way which accommodates both VFR and IFR operation in the same airspace.
However, a pilot can only choose to fly IFR if they possess an instrument rating which is above and beyond the basic pilots license that must also be held.
　　段落大意 　　本段介绍了两种操作环境下飞行规则的选择，以及晴天下可以遥的飞行规则及其遥条件。
　　阅读笔记 　　Two types of operating environments： 　　1.
Good meteorological conditions： VFR 　　2.
Poor visibility: IFR 　　On a clear day: VFR or IFR 　　HOWEVER, if instrument rating pilots license, only VFR 　　逻辑关系 　　1.
并列 　　In good meteorological conditions, flying would be permitted under Visual Flight Rules .
　　Poor visibility necessitated a set of Instrumental Flight Rules .