这种药物仅限外用，切勿内服。

This medication is for external use only and should not be taken ___internally.

内网系统有助于在整个组织内部共享信息。

The intranet system helps share information ___internally across the organisation.

团队内部的争议最好在内部解决，以保持机密性。

Disputes within the team are best resolved ___internally to maintain confidentiality.