electric marking pen

例句：

1. 1. This electric marking pen is very useful for marking on paper.
   这种电标笔在纸上标记非常有用。
2. 2.The teacher asked the students to use the electric marking pen to draw their names on the blackboard.
   老师要求学生们用电标笔在黑板上画他们的名字。
3. 3.The student used the electric marking pen to write down the answers on the test paper.
   学生用电标笔在试卷上写下答案。