Zhemchuzhnikovite
草酸铝钠石
🗣️ 情景例句
How can I reward your help?
我怎样才能报答你的帮助呢？
The petroleum region is centered largely in the north.
那里的石油区大部分集中在北部。
I've got a problem and as I don't know what to do I thought I'd write to you and ask for your advice.
我有一个问题，因为我不知道该怎么办。我想我最好写信给你，征求你的意见。