Petrography
出国 Abroadn. 岩相学
🗣️ 情景例句
When did the Roman Empire come into being?
罗马帝国是什么时候形成的？
Suit the action to the word.
怎么说就怎么做。
The survey revealed a large number of sources of noise that we really dislike.
这个调查显示出很大数目我们不喜欢的噪音源：