Carburizing
[機] 滲碳
??? 情景例句
my mother is running for the school board?
我母親競選聯合校董會董事嗎？
He devoted his life to promoting world peace.
他一生致力于促進世界和平。
At exactly that moment, the telephone rang.
恰恰在此時，電話鈴響了。