Vocab Bloom Hub

hard coal

/hɑːrd koʊl/

翻译: 一种碳含量高、水分低、能量密度高的煤,以燃烧时烟少或火焰小而著称。也称为无烟煤。

1 个条目

phrase

/hɑːrd koʊl/C1formaltechnical
  • zh一种碳含量高、水分低、能量密度高的煤,以燃烧时烟少或火焰小而著称。也称为无烟煤。

A type of coal with a high carbon content, low moisture, and high energy density, known for burning with little smoke or flame. Also called anthracite.

  1. AnthraciteB2formal

    A hard, compact variety of coal that has a high luster and a high carbon content, burning with little smoke or flame.

    zh无烟煤

    • Hard coal is often used for heating homes because it burns cleanly.
    • The mine produced mostly hard coal, which is highly valued.
    • Unlike soft coal, hard coal produces very little smoke when burned.