2 sentences

1. 那老人喃喃地说他饿了。

   nà lǎo​rén nán​nán de shuō tā è le.

   The old man mumbled that he was hungry.

   Source: AI Challenger 2017

2. 我喃喃地说了一个借口，然后离开了。

   wǒ nán​nán de shuō le yī​ge jiè kǒu, rán​hòu lí kāi le.

   I muttered an excuse and left.

   Source: CCMatrix