2 sentences

1. 这些“失败的恒星”被称为褐矮星。

   zhè​xiē“ shī​bài de héng​xīng” bèi chēng​wéi hè ǎi​xīng.

   These ‘failed stars’ are known as brown dwarfs.

   Source: CCMatrix

2. 地球附近大约有80%的恒星都是红矮星。

   dì​qiú fù​jìn dà​yuē yǒu80% de héng​xīng dōu shì hóng'ǎi​xīng.

   About 80% of the stars near Earth are red dwarfs.

   Source: CCMatrix