biannual

/baɪˈænjuəl/ 83托福
A biannual event happens twice a year. 每年两次的

adjective [原级]一年两次的

Only since 1962 has the show been held biannually.
从1962以后,这个节目才开始每年举行两次。

bi- 表示"两个,两"biannual 一年两次的(bi+ann[年]+ual→一年两次的)
单词造句: