lowered

verb [vt. 及物动词]（天空）变昏暗，变恶劣；减少，降低；把（某物）移低；向下看，垂下；露色，皱眉；削弱（lower 的过去式和过去分词）

Every evening at sunset the flag was lowered.
每天傍晚日落时都要降旗。