For example, a steam engine can use coal, newspaper or wood for the fuel, while an internal combustion engine needs pure, high-quality liquid or gaseous fuel.
例如，蒸汽发动机可以用煤，报纸或木头作为燃料，而内燃机需要用纯的，高质量液体燃料或气体燃料。
3
This produces a quality that is similar to that of the high-speed DOD inkjet printers and is suited for transactional, direct mail and newspaper applications.