carbon content in coal

• 煤中碳

carbon content in coal的用法和样例：

例句

1. A more promising technique for early detection focuses on changes in carbon isotopes in carbon dioxide.
   有一种较被看好的预先侦测技术，是以二氧化碳中碳同位素的变化做为分析重点。
2. High steam carbon ratios were required to prevent carbon formation in the reformer tubers.
   为了防止重整管中碳的形成，蒸汽与碳的比率需要非常高。