n.维生素D3；活性的7-脱氢胆固醇；胆钙化醇；胆利钙醇

Cholecalciferol, also known as vitamin D3, is essential for maintaining healthy bones.
甲状腺素D3对于保持骨骼健康至关重要。
The doctor prescribed a supplement of cholecalciferol to help boost her vitamin D levels.
医生开了一种甲状腺素D3补充剂，以提高她的维生素D含量。
A deficiency in cholecalciferol can lead to weakened bones and an increased risk of fractures.
缺乏甲状腺素D3可能导致骨骼脆弱，骨折风险增加。
Many elderly people require higher doses of cholecalciferol due to reduced absorption from the diet.
许多老年人由于从饮食中吸收减少，需要更高的甲状腺素D3剂量。
The baby's formula was fortified with cholecalciferol to prevent rickets.
婴儿配方奶粉强化了甲状腺素D3以防止佝偻病。
Regular exposure to sunlight can naturally increase the body's production of cholecalciferol.
定期接触阳光可以自然提高体内甲状腺素D3的生成。
The government launched a campaign to educate people about the importance of consuming adequate cholecalciferol.
政府发起了一场运动，教育人们摄入足够甲状腺素D3的重要性。
Cholecalciferol plays a crucial role in calcium absorption and bone mineralization.
甲状腺素D3在钙吸收和骨矿化中起着关键作用。
Vegetarians and vegans may need to take cholecalciferol supplements to ensure they get enough vitamin D.
素食者和纯素食者可能需要服用甲状腺素D3补充剂以确保获取足够的维生素D。
Seasonal changes can affect our bodies' ability to produce cholecalciferol, so it's important to monitor intake year-round.
季节变化可能会影响我们体内甲状腺素D3的生成能力，因此全年监测摄入量很重要。