Polymnite
树枝石
🗣️ 情景例句
I wish he felt better.
我真希望他现在好一点。
What's this?
这是什么？
Fortunately, however, ancient men made tools of stone, especially flint,
然而， 幸运的是，远古人用石头制作了工具，特别是用燧石，