계절季節 season 사계절四季節 four seasons 계절병季節病 seasonal disease 계절성季節性 seasonality 계절적季節的 being seasonal 계절적季節的 seasonal 추계秋季 fall season 춘계春季 spring season 하계夏季 summer season 계간季刊 quarterly publication 계간지季刊誌 quarterly; quarterly journal; quarterly magazine 계절풍季節風 seasonal wind 동계冬季 winter season 사계四季 four seasons