钢笔尖

例句：

1. 1. The pen is so sharp that it can write on paper without a pencil.
   这支笔太锋利了，可以在纸上写字而不需要铅笔。
2. 2. The artist carefully trimmed the pen tip to make it look more natural.
   艺术家小心翼翼地修剪笔尖，使其看起来更自然。
3. 3. The teacher asked the students to demonstrate how to use the pen tip for writing.
   老师要求学生们演示如何使用笔尖进行书写。