单词：Cai Lun
Cai Lun的用法和样例：
例句
- Cai Lun was a Chinese eunuch, who is conventionally regarded as the inventor of paper and the papermaking process.蔡伦是中国的宦官，他常被人们称为是造纸及纸张制造的发明者，虽然在他以前中国就已经有了纸。
- A court official named Cai Lun was determined to develop a new and better writing material.当时一位名叫蔡伦的宦官决定发明一种更新更好的书写材料。
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