flight 和 flying 有啥区别?

请问number of flight 和flight number 区别 fly和flying的区别, fly flight这两个有什么区别 飞过森林,flying over the forests,用flying和动词不定式在含义上有什么区别 单词 airline 和flight 的词性?区别?用法? On the Air 和 on the flight区别 fly to London / flight to London有什么区别啊? flight plane 区别 英语翻译Ladies and gentlemen,welcome to this flight flying from plane,flight,fly 与aircraft的区别 flying ..fight or flight 啥意思