black gold

短语

黑金

发音

AU

释义与例句

n.
  1. 1.

    Raw petroleum; crude oil.

    黑金

    习语 非正式 不可数
  2. 2.

    Black pepper, in the context of being a historically valuable spice.

    不可数
  3. 3.

    Black-coloured gold, variously produced by patination, deposition, oxidation, etc. and used in jewellery or in high-technology applications.

    不可数
  4. 4.

    Coal.

    不可数

词源

(crude oil; coal; black pepper): From its black colour and high value.

来源：wiktionary