hang the flag at half-mast

• 下半旗(表示哀悼)

hang the flag at half-mast的用法和样例：

例句

1. All the flags were at half-mast when the king died.
   国王驾崩，全国都下半旗志哀。
2. The national flag flew at half-mast in mourning in the centre of Tian An Men Square.
   天安门广场下半旗致哀。