strike-off board

例句：

1. 1.The teacher had to strike a new approach to the lesson because of the strike-off board.
   由于罢工的板子，老师不得不采取新的教学方法。
2. 2. The students were instructed to use the strike-off board for their assignments.
   学生们被要求使用罢工的板子来完成作业。
3. 3. The engineer was required to replace the strike-off board before starting work on the project.
   工程师在开始项目工作之前，必须更换罢工的板子。