基本解釋跑道進口英漢例句雙語例句Witnesses said that the aircraft apparently impacted a Fed-Ex semi truck traveling on U. S. 131 just a short distance from the runway threshold.目擊者稱，貌似飛機撞到了一輛行駛在131號公路上得半掛卡車，當時卡車位于跑道入口附近。IS the parenthetical figure following DH, DA or MDA which, when added to the touchdown zone, runway end, or threshold elevation, will give the DH, DA or MDA in feet above mean sea level.決斷高度或最低下降高度后括號中的數(shù)值。它與接地區(qū)、跑道頂端、或跑道頭標高相加后即是決斷高度（DA，DH）或最低下降高度（MDA）高于平均海平面英尺數(shù)。runway threshold更多例句詞組短語短語runway approach threshold 跑道進場端Runway threshold identification lights 頭識別燈runway threshold detail 跑道進口runway threshold light 跑道入口燈Runway threshold marking 跑道末端標志runway threshold更多詞組專業(yè)釋義航空、航天科學技術(shù)跑道進口跑道入口