3 sentences

1. 这只手表的内部结构非常精巧。

   zhè zhī shǒu​biǎo de nèi​bù jié​gòu fēi​cháng jīng​qiǎo.

   The internal mechanism of this watch is very ingenious.

   Source: Dong Chinese Dictionary

2. 这个盒子里藏着一个精巧的机关。

   zhè​ge hé​zi lǐ cáng zhe yī gè jīng​qiǎo de jī​guān.

   A clever mechanism is hidden in this box.

   Source: Dong Chinese Dictionary

3. 这部电影的构思非常精巧，令人耳目一新。

   zhè bù diàn​yǐng de gòu​sī fēi​cháng jīng​qiǎo, lìng rén ěr​mù​yī​xīn.

   The concept of this movie is very ingenious and refreshing.

   Source: Dong Chinese Dictionary