3 sentences

1. 毒镖蛙是非常细心的父母。

   dú​biāo​wā shì fēi​cháng xì​xīn de fù​mǔ.

   Poison dart frogs are very attentive parents.

   Source: AI Challenger 2017

2. 我变得更善于交际，健谈，细心和放松。

   wǒ biàn​de gèng shàn​yú jiāo​jì, jiàn​tán, xì​xīn hé fàng​sōng.

   I became more sociable, talkative, attentive and relaxed.

   Source: CCMatrix

3. 这房子是在一位建筑师的细心监督下建造的。

   zhè fáng​zi shì zài yī wèi jiàn​zhù​shī de xì​xīn jiān​dū xià jiàn​zào de.

   The house was built under the careful supervision of an architect.

   Source: UM-Corpus: Education