| 普通话 | cmn-000 |
| 初步研究 | |
| العربية | arb-000 | دراسة نظرية |
| English | eng-000 | desktop study |
| English | eng-000 | pilot study |
| English | eng-000 | preliminary investigation |
| English | eng-000 | preliminary study |
| français | fra-000 | étude préliminaire |
| русский | rus-000 | первоначальный анализ |