有關observance的精選大全

用observance造句子,“observance”造句
Speakingoutisthethemeofthisyear'sobservance.ThefeastwasmoreofatraditionalEnglishharvestfestivalthanatrue"Thanksgiving"observance.OthereventsatFAOheadquartersinobservanceofWorldFoodDayare.Duringtheo...
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