2 sentences

1. 我平常是一个很沉着冷静的人。

   wǒ píng​cháng shì yī​ge hěn chén​zhuó lěng​jìng de rén.

   I'm usually a very calm and collected person.

   Source: OpenSubtitles

2. 为了营造沉着的气氛，说话稍微慢点很重要。

   wèi​le yíng​zào chén​zhuó de qì​fēn, shuō huà shāo​wēi màn diǎn hěn zhòng​yào.

   In order to create a calm atmosphere, it is important to speak a little slower.

   Source: CCMatrix