滞后 (zhì hòu): Lag / fall behind (Verb) — Meaning & Stroke Order

My watch is five minutes behind.

Why does our technology R&D always fall behind our competitors?

His learning progress is not lagging; on the contrary, he completed the task ahead of schedule.

Due to the lag in technological updates, the company's competitiveness is gradually declining.

Due to information lag and poor communication, the project experienced a serious delay.