spot board

例句：

1. 1. The spot board was used to mark the boundaries of the field.
   点板用于标记田地的边界。
2. 2. The dot board helped us to quickly identify the important information on the page.
   点板帮助我们快速识别页面上的重要信息。
3. 3. The spot board was a useful tool for organizing and prioritizing tasks.
   点板是一个有用的工具，用于组织和优先处理任务。