annual          
 adjective [ before noun ] uk/ˈæn.ju.əl/ us/ˈæn.ju.əl/
B1 一年一度的;每年的
happening once every year
  an annual event/visit/holiday 年度大事/每年一次的访问/每年的假期 
 Companies publish annual reports to inform the public about the previous year's activities. 公司发布年度报告,告知公众上一年的具体业务。 
 B1 一年的
relating to a period of one year
  annual income/salary/profit 年收入/年薪/年利润 
 - More examples
- They spent their annual holiday on a yacht in the Caribbean.
- The flowers at the annual flower show were a beautiful sight.
- The average annual rainfall in this region is 750 mm.
- The government have just launched their annual Christmas campaign to stop drunken driving.
- You will receive annual pay increments every September.
annual  
noun [ C ] uk/ˈæn.ju.əl/ us/ˈæn.ju.əl/
  (BOOK)       
  年刊,年报;(尤指)儿童年册
a book or magazine published once a year, especially for children, with the same title and style but different contents
  US(学校或其他机构出版的)年刊,年鉴 
a  yearbook 
   (PLANT)      
 一年生植物
a plant that grows, produces seeds, and dies within one year
 Compare: biennial adjectiveperennial noun