3 sentences

1. 深度睡眠和轻度睡眠有什么区别？

   shēn​dù shuì​mián hé qīng​dù shuì​mián yǒu shén​me qū​bié?

   What is the difference between deep sleep and light sleep?

   Source: CCMatrix

2. 症状可以从轻度到重度，并可能随时间而改变。

   zhèng​zhuàng kě​yǐ cóng qīng​dù dào zhòng​dù, bìng kě​néng suí shí​jiān ér gǎi​biàn.

   Symptoms can range from mild to severe and may change over time.

   Source: CCMatrix

3. 您应该每六到八周修剪一次头发，即使只是轻度修剪也是如此。

   nín yīng​gāi měi liù dào bā zhōu xiū​jiǎn yī​cì tóu​fa, jí​shǐ zhǐ​shì qīng​dù xiū​jiǎn yě​shì rú​cǐ.

   You should trim your hair every six to eight weeks, even if it’s just a light trim.

   Source: CCMatrix