3 sentences

1. 夏天的阳光中含有强烈的紫外线。

   xià​tiān de yáng​guāng zhōng hán​yǒu qiáng​liè de zǐ​wài​xiàn.

   Summer sunlight contains strong ultraviolet rays.

   Source: Dong Chinese Dictionary

2. 阳光中的紫外线具有天然的杀菌作用。

   yáng​guāng zhōng de zǐ​wài​xiàn jù​yǒu tiān​rán de shā​jūn zuò​yòng.

   The ultraviolet rays in sunlight have a natural sterilizing effect.

   Source: Dong Chinese Dictionary

3. 地球的大气层保护着我们免受紫外线伤害。

   dì​qiú de dà​qì​céng bǎo​hù zhe wǒ​men miǎn​shòu zǐ​wài​xiàn shāng​hài.

   Earth's atmosphere protects us from ultraviolet rays.

   Source: Dong Chinese Dictionary