binding coal

例句：

1. 1. The mining company is using binding coal to increase the efficiency of its operations.
   这家矿业公司正在使用绑定煤炭来提高其运营效率。
2. 2. The coal mine is producing high-quality binding coal that meets international standards.
   这个煤矿生产的高质量绑定煤炭符合国际标准。
3. 3. The use of binding coal has been banned in some countries due to environmental concerns.
   由于环境问题，某些国家已经禁止使用绑定煤炭。