1、They issued a commemorative stamp to mark the anniversary of the city's founding.
他们发行了一枚纪念邮票，以庆祝城市建立的周年纪念。
2、The museum is hosting a commemorative exhibition to honor the soldiers who lost their lives in the war.
博物馆举办了一场纪念展览，以表彰在战争中牺牲的士兵。