笔杆

例句：

1. 1. She uses a pen to write down her thoughts.
   她用笔记录下自己的想法。
2. 2. The teacher asked the students to raise their hands and answer questions.
   老师要求学生们举手回答问题。
3. 3. He took out his pen and started writing on the paper.
   他拿出笔开始在纸上写字。