seasonallyadv.季节性地seasonaladj.季节的；依照季节的；周期性的seasonal unit roots季节单位根seasonal employment[经] 季节工, 季节性就业seasonal prediction季度预报seasonal population季节种群seasonal correction季节调整seasonal difference季节差异seasonal rain front季节性雨锋seasonal succession季节演替Seasonal frost area季节冻土区seasonal coloration季节色泽