But the GPS receivers on the Air China 757 fix the position of the aircraft to within a few metres as it begins its descent through a long valley, around an awkward ridge and down onto the new runway at Linzhi.是什么意思_But the GPS receivers on the Air China 757 fix the position of the aircraft to within a few metres as it begins its descent through a long valley, around an awkward ridge and down onto the new runway at Linzhi.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句