According to the regulation of civil aviation,pilots need to attend Full Flight Simulator(FFS) recurrent training every six months,according to civil aviation rules.是什么意思_According to the regulation of civil aviation,pilots need to attend Full Flight Simulator(FFS) recurrent training every six months,according to civil aviation rules.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句