炼制

tā liàn zhì le yuán yóu

他炼制了原油。

He refined crude petroleum.

liàn zhì shí yóu

炼制石油

petroleum refining

gāng shì tiě jiā tàn liàn zhì chéng de

钢是铁加碳炼制成的。

Steel is produced by combining iron with carbon.