seasonaladj.季节的；依照季节的；周期性的seasonal trades季节贸易,季节性行业seasonal nature季节性seasonal duties[经] 季节性关税Seasonal Growth季节消长seasonal labour季节工seasonal aspect季相seasonal change季节变化seasonal forest季节性森林, 季相林seasonal credit季节贷款,按季度提供的放款seasonal grades季节级别