3 sentences

1. 这片沼泽地步步惊心，必须要有向导带路。

   zhè piàn zhǎo​zé​dì bù​bù jīng​xīn, bì​xū yào yǒu xiàng​dǎo dài​lù.

   This swampland is full of hidden dangers; a guide is necessary to lead the way.

   Source: Dong Chinese Dictionary

2. 这起事故的现场极其惊心，让人不敢直视。

   zhè qǐ shì​gù de xiàn​chǎng jí​qí jīng​xīn, ràng rén bù gǎn zhí​shì.

   The scene of the accident was so shocking that one couldn't bear to look.

   Source: Dong Chinese Dictionary

3. 听着窗外剧烈的撞击声，他感到一阵惊心。

   tīng zhe chuāng wài jù​liè de zhuàng​jī​shēng, tā gǎn​dào yī zhèn jīng​xīn.

   He felt a sense of alarm as he listened to the violent crashing sound outside the window.

   Source: Dong Chinese Dictionary