源卷

例句：

1. 1. The ancient texts are the source of our knowledge.
   古代文献是我们知识的源泉。
2. 2. The manuscript contains valuable historical records.
   手稿中包含宝贵的历史记录。
3. 3. The library has a vast collection of books, including many rare manuscripts.
   图书馆收藏了大量书籍，包括许多稀有手稿。