Ledrit
鉛黑銅; 鉛黃銅
??? 情景例句
Scientific discoveries are ofter applied to industrial production methods.
科學新發現常應用于工業生產的方法。
I'm not accustomed to going out after dark.
我不習慣在天黑了以后去外面。
I'll go.I think it's my friend.
我去開門，我想是我的朋友。