Ulvite
方钛铁矿
🗣️ 情景例句
Still waters run deep.
冰冻三尺非一日之寒。
What time is it now?
现在几点？
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。