1 sentence for 低低 (dī​dī — low; soft)

1. 我听见卧室里有低低的锤打声。

   wǒ tīng jiàn wò​shì li yǒu dī​dī de chuí​dǎ shēng.

   I heard a low hammering sound in the bedroom.

   Source: AI Challenger 2017