1 sentence

1. 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