Petrography
出国 Abroadn. 岩相学
🗣️ 情景例句
Do you have any questions in mind about them, Mr. Martin?
你还有什么问题吗，马丁先生？
A good horse oft needs a good spur.
好马常需好靴刺。
I think I'm in a difficult position.
我想我现在的处境困难。