例句 /

In recent years, the problem of hub-airport siting and flight route network design has been of extensive concern to the civil aviation industry.

In recent years, the problem of hub-airport siting and flight route network design has been of extensive concern to the civil aviation industry.

摘要枢纽机场选址与航线网络优化问题是近年来受到民航业界广泛关注的热点问题之一。