恢复正常 literally means 'restore to normal' — it combines 恢复 ('to restore, to resume') and 正常 ('normal, regular'). Together, the phrase describes the process or state of returning to a prior stable, healthy, or expected condition after disruption — such as after illness, system failure, or social disturbance. It emphasizes a full return to baseline functioning, not just partial improvement.

This expression is commonly used in medical contexts (e.g., after surgery or infection), technical settings (e.g., networks or machinery resuming operation), and everyday life (e.g., routines returning after travel or holidays). It carries a formal yet natural tone and often appears with time phrases like 逐渐 (gradually) or 很快 (soon), or with subjects like 身体 (body), 系统 (system), or 生活 (life).