penak

例句：

1. 1. 笔
   pen
2. 2.钢笔
   pen
3. 3. 书写工具
   pen
4. 1. I need a pen to write my homework.
   我需要一支笔来写作业。
5. 2. He used a pencil to draw the picture.
   他用铅笔画了这幅画。
6. 3. The teacher marked the exam paper with a red marker.
   老师用红笔在试卷上做了标记。