biannual

1. ADJ A biannual event happens twice a year. 每年两次的

You will need to have a routine biannual examination. 你需要做一年两次的常规检查。

2. biannuallyADV 每年两次地[ADV after v]

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。