2 sentences

1. 它们安安静静，从不抱怨。

   tā​men ān'ān​jìng​jìng, cóng​bù bào​yuàn.

   They're quiet and never complain.

   Source: AI Challenger 2017

2. 两个人安安静静地并肩坐在船上。

   liǎng​ge​rén ān'ān​jìng​jìng de bìng​jiān zuò​zài chuán shang.

   The two of them quietly sat side-by-side on the boat.

   Source: CCMatrix