3 sentences

1. 为什么一个人需要维生素A？

   wèi​shén​me yí​ge​rén xū​yào wéi​shēng​sù'ēi?

   Why does a person need vitamin A?

   Source: CCMatrix

2. 维生素A对你的视力和免疫系统很重要。

   wéi​shēng​sù'ēi duì nǐ de shì​lì hé miǎn​yì​xì​tǒng hěn zhòng​yào.

   Vitamin A is important for your vision and immune system.

   Source: CCMatrix

3. 如果你体内没有足够的维生素A，你就会有视力问题。

   rú​guǒ nǐ tǐ​nèi méi​yǒu zú​gòu de wéi​shēng​sù'ēi, nǐ jiù huì yǒu shì​lì wèn​tí.

   If you don’t have enough vitamin A in your body, you’ll have vision problems.

   Source: CCMatrix