同根派生 air cover相關(guān)詞英漢例句用作名詞 (n.)Mayday!Mayday!require air support immediately!呼叫空中支援，呼叫空中掩護。For this operation we need plenty of air cover,ie protection by military aircraft.為進行這次軍事行動，我們需要充足的空中掩護。air cover更多例句