half-mast
n.(名词)The position about halfway up a mast or pole at which a flag is flown as a symbol of mourning for the dead or as a signal of distress.Also called half-staff 半旗:桅杆或旗杆一半的高度,旗帜在这个位置上飘动意味着向死者表示哀悼或是灾害的信号也作 half-staffv.tr.(及物动词)half-.mast.ed,half-.mast.ing,half-.masts To place (a flag) halfway up a mast or pole.降(半旗):(将一面旗)升到桅杆或旗杆一半的高度上