marker pen

例句：

1. 1. This marker pen is very useful for drawing on paper.
   这支标记笔在纸上写字非常方便。
2. 2. The teacher marked the important points in the text with a marker pen.
   老师用标记笔在文本中标记了重要内容。
3. 3. The student used a marker pen to write down their notes during class.
   学生用标记笔在课堂上写下了笔记。