volatile fraction in petroleum coke

例句：

1. 1. The gas is volatile and can be easily ignited.
   这种气体是易挥发的，很容易点燃。
2. 2.Volatile compounds are often found in plants that grow in hot climates.
   在炎热气候下生长的植物中常常发现易挥发化合物。
3. 3. The volatile nature of the substance means it will decompose quickly.
   这种物质的易挥发性质意味着它会很快分解。