Decoppering
除銅
??? 情景例句
She was still beautiful at the age of forty.
她活到四十歲仍然很美。
If the ox falls,whet your knife.
牛一倒，快磨刀；人遭難，眾人踩。
He did not know from which part of Africa his ancestor had come.
他不知道祖先來自非洲的什么地方。