日期：
来源：雅诚德英语网
The former is called coins, a coin may be made of gold, silver, copper, aluminium...
前者称为硬币，硬币可由于金，银，铜，镍和铝等金属铸成
The former is called coins, a coin may be made of gold, silver, copper, aluminium...
前者称为硬币，硬币可由于金，银，铜，镍和铝等金属铸成