seasonaladj.季节的；依照季节的；周期性的seasonal goods季节性商品seasonal torpor季节性麻痹seasonal famine季节性饥荒seasonal hawker季节性小贩seasonal stream季节河,季节性河流seasonal length季节长度seasonal tariff[经] 季节性税率seasonal rhythm季节性节律seasonal strain晚熟种seasonal factor季节因子