king willem-Alexander of the Netherlands said that he recently ended his role as a regular "guest pilot" after 21 years with the national airlines fleet of now-outdated aircraft.
2018年12月四级真题（第二套）听力 Section A
柯林斯高阶英汉双解学习词典释义
N-COUNT
航空公司
An airline is a company which provides regular services carrying people or goods in aeroplanes.