他在睡梦中安详离世。

Tā zài shuìmèng zhōng ānxiáng líshì.

He passed away peacefully in his sleep.

他于昨天安详离世。

Tā yú zuótiān ānxiáng líshì.

He passed away peacefully yesterday.

我希望退休后可以过着安详的晚年生活。

Wǒ xīwàng tuìxiū hòu kěyǐ guòzhe ānxiáng de wǎnnián shēnghuó.

I hope I can live a peaceful life in my later years after I retire.