| English | eng-000 |
| retention range | |
| 普通话 | cmn-000 | 保持同步范围 |
| 普通话 | cmn-000 | 同步区 |
| 普通话 | cmn-000 | 陷落范围 |
| English | eng-000 | hold range |
| English | eng-000 | retaining zone |
| English | eng-000 | synchronization zone |
| English | eng-000 | synchronizing band |
| English | eng-000 | zone of synchronization |