短語(yǔ)詞組短語(yǔ)at half -mast 降半旗half -mast belay 半柱確保flag at half -mast 降半旗Half -mast The Flag 下半旗Flags at Half -mast 降半旗fly a flag at half -mast 降半旗;下半旗 返回 half mast