这里的环境平静。

Zhèlǐ de huánjìng píngjìng.

The environment here is peaceful.

我任何时候都尽量保持心境平静。

Wǒ rènhé shíhou dōu jǐnliàng bǎochí xīnjìng píngjìng.

I try to keep calm at all times.

事情发生得太突然，到现在我的心情还没平静下来。

Shìqíng fāshēng de tài tūrán, dào xiànzài wǒ de xīnqíng hái méi píngjìng xiàlái.

Everything happened so suddenly that I still haven't calmed down.