metacarpal quill

例句：

1. 1.The artist used a metacarpal quill to draw the portrait.
   艺术家用中指骨尖笔绘制了肖像。
2. 2.The writer used a metacarpal quill to write his novel.
   作家用中指骨尖笔写了他的小说。
3. 3.The artist and writer both used metacarpal quills for their art.
   艺术家和作家都用中指骨尖笔进行艺术创作。