natural coke

例句：

1. 1. The natural coke is a popular choice for cooking and baking.
   天然焦炭是烹饪和烘焙的热门选择。
2. 2.The natural coke was used as fuel in the old days of steam engines.
   天然焦炭在蒸汽机的时代用作燃料。
3. 3. The natural coke is extracted from coal and has a high carbon content.
   天然焦炭是从煤炭中提取的，碳含量高。