met‧al S2 W2 / metl / 名词 [可数和不可数名词]

a hard, usually shiny substance such as iron, gold, or steel → metallic :

The gate is made of metal.

a small black metal box

They traded in gold and other precious metals (= valuable metals used especially for making jewellery ) .

The old trucks were sold as scrap metal (= old metal that is melted and used again ) .

→ heavy metal