3 sentences

1. 国际局势变幻莫测。

   guó​jì jú​shì biàn​huàn mò​cè.

   The international situation is volatile and unpredictable.

   Source: Dong Chinese Dictionary

2. 传说深山里住着很多能够变幻人形的神灵。

   chuán​shuō shēn​shān lǐ zhù zhe hěn​duō néng​gòu biàn​huàn rén​xíng de shén​líng.

   Legend has it that many spirits capable of changing into human form live in the deep mountains.

   Source: Dong Chinese Dictionary

3. 山顶上风云变幻，我们必须在暴雨前赶快下山。

   shān​dǐng shàng fēng​yún biàn​huàn, wǒ​men bì​xū zài bào​yǔ qián gǎn​kuài xià​shān.

   The weather on the mountain top is changing rapidly; we must descend quickly before the rainstorm.

   Source: Dong Chinese Dictionary