Copper (element Cu) — a soft, ductile metal that conducts heat and electricity well.
銅線は電気を良く通す。
Copper wire conducts electricity well.
古代から銅は道具や装飾に使われてきた。
Copper has been used for tools and ornaments since ancient times.
Bronze (medal) — an abbreviation for the bronze medal awarded for third place.
彼は今年の大会で銅を獲得した。
He won the bronze at this year's competition.
銅メダルを取った選手は感激で涙を流した。
The athlete who took the bronze medal was moved to tears.