once-a-year編輯正在努力提供更完整的內容，建議 20 分鐘後再回來看看once-a-yearonce-a-year — 形容詞形容詞1. happening only one time per year1.形容詞釋義一年一度的happening only one time per year例句The company holds a once-a-year meeting for all employees.