bi-annual
柯林斯词典
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。
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