biennialy

例句：

1. 1. The team practices biennially to improve their performance.
   该团队每年两次练习以提高表现。
2. 2.The festival is held biennially to celebrate the harvest.
   这个节日每年两次举行以庆祝收获。
3. 3. The company conducts biennial audits to ensure compliance with regulations.
   该公司每年两次进行审计以确保遵守法规。