| 已 | yǐ | already; to stop; then; afterwards |
| 验证 | yàn zhèng | to inspect and verify; experimental verification; to validate (a theory); to authenticate |
| 联系 | lián xì | connection; contact; relation; to get in touch with; to integrate; to link; to touch |
| lián xì | variant of 聯繫|联系[lian2 xi4] | |