black gold

1. 1.

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

   黑胡椒,指历史上作为珍贵香料的胡椒。

2. 2.

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

   黑色黄金,通过锈蚀、沉积、氧化等方法制成,用于珠宝或高科技领域。

3. 3.

   Coal.

   煤。

黑色黄金,通过锈蚀、沉积、氧化等方法制成,用于珠宝或高科技领域。；煤。；黑金