fortnightly periods

例句：

1. 1. The team practices fortnightly to improve their skills.
   团队每两周训练一次以提高技能。
2. 2. They meet every two weeks to discuss the progress of their project.
   他们每两周见面讨论项目进展。
3. 3. The book is available in two fortnightly editions.
   这本书每两周发行一次。