Caenstone
亮褐色海生石灰岩
🗣️ 情景例句
Could you tell me a little about your background?
能否请您简短地谈一下贵公司的背景？
You'll solve the problem if you concentrate upon it.
如果全神贯注，你就会解决这个问题。
I agree.
我同意。