Chalcocitization
辉铜矿化(作用)
🗣️ 情景例句
at my junior high school graduation.
在我初中毕业的时候。
We must not lie down, and cry, God help us.
求神不如求己。
She finished it at half past nine. She went to bed before a quarter to ten.
30 她完成了作业。她9：45之前上床睡觉。