vitamine D↓1

例句：

1. 1. Vitamin D is essential for bone health and can help prevent some types of cancer.
   维生素D对骨骼健康至关重要，可以帮助预防某些类型的癌症。
2. 2.The elderly need more vitamin D to maintain their bones and muscles.
   老年人需要更多的维生素D来保持他们的骨骼和肌肉。
3. 3. Many people take supplements with vitamin D to boost their immune system.
   许多人服用含有维生素D的补充剂来增强免疫系统。