to execute a letdown procedure進(jìn)行: be in progress; be underway; ...下降: descend; go or come down; dr ...程序: procedure穿云下降: come down through the overcast; descend through cloud; descend throught cloud; descent through cloud; letdown穿云下降飛行: let down下載手機(jī)詞典可隨時(shí)隨地查詞查翻譯
