vitamin C deficiency

例句：

1. 1.The lack of vitamin C in the diet can lead to a deficiency.
   饮食中缺乏维生素C会导致缺乏。
2. 2.Many people suffer from vitamin C deficiency due to poor nutrition.
   由于营养不良，许多人患有维生素C缺乏症。
3. 3. Vitamin C deficiency is often caused by a lack of sunlight and fresh air.
   维生素C缺乏症通常由缺乏阳光和新鲜空气引起。