| 普通话 | cmn-000 |
| 二次能源 | |
| العربية | arb-000 | طاقة ثانوية |
| English | eng-000 | secondary energy |
| English | eng-000 | secondary energy sources |
| English | eng-000 | secondhand energy |
| français | fra-000 | énergie secondaire |
| русский | rus-000 | вторичная энергия |
| español | spa-000 | energía secundaria |