fuel impurity

• 燃料的杂质

fuel impurity的用法和样例：

例句

1. The impurity on the craft means the stone and quality are not even.
   工艺上的杂质是指石和质地不均匀。
2. The oxygen reacts vigorously with the impurity in the iron.
   氧气与铁中的杂质发生剧烈的化学反应。