3 sentences

1. 15分钟的清醒梦是一种很酷的体验。

   15 fēn​zhōng de qīng​xǐng​mèng shì yī​zhǒng hěn kù de tǐ​yàn.

   A 15-minute lucid dream is a cool experience.

   Source: CCMatrix

2. 有许多关于梦想，梦想解释和清醒梦想的书籍。

   yǒu xǔ​duō guān​yú mèng​xiǎng, mèng​xiǎng jiě​shì hé qīng​xǐng​mèng xiǎng de shū​jí.

   There are many books on dreams, dream interpretation, and lucid dreaming.

   Source: CCMatrix

3. 昨晚在一次20分钟的午夜小睡期间，我做了一个清醒梦。

   zuó​wǎn zài yī​cì20 fēn​zhōng de wǔ​yè xiǎo​shuì qī​jiān, wǒ zuò le yī​ge qīng​xǐng​mèng.

   Last night during a 20-minute midnight nap, I had a lucid dream.

   Source: CCMatrix