inkstone

例句：

1. 1. The inkstone is a stone used to make ink.
   墨水石是一种用来制作墨水的石头。
2. 2. The inkstone was found in the library's basement.
   墨水石在图书馆的地下室被发现。
3. 3.The inkstone has been used for centuries as a writing instrument.
   墨水石作为一种书写工具，已经被使用了几个世纪了。