seasonal：adj.季節性的；隨季節變化的；節令性的 擴展資料
Seasonal diseases are common when winter turns into spring.
冬春之交是時令病流行的季節。
Longing for the sea, is a seasonal symptom, and can't be restrained.
對海洋的`摯念，似乎是壹種無可抑止的季節性疾病。
Most farming is seasonal.
大凡農活都有時間性。