seasonal [ˈsizənəl]

例句:

• This condition is called seasonal affective disorder, or SAD for short.
  这种病情叫做季节性情感失调症，或简称SAD。
  
• This snake exhibits dramatic seasonal changes in skin colour.
  来自BBC
• Temporary workers to cope with seasonal variation in demand.
  来自Independent
• recipes that make imaginative use of seasonal vegetables
  妙用时令蔬菜的菜谱
  
• the seasonal cycle of death and rebirth
  死而复生的四季轮回
  
• The weather simply puts people off buying seasonal stock.
  来自THETIMES