Petrography
出国 Abroadn. 岩相学
🗣️ 情景例句
What's on my schedule for today?
我今天有什么日程安排？
Friendship should not be all on one side.
友谊不该只是单方面的事。
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，