名词
中文翻译：前钙素
同义词：
['procalciferol', 'calciferol', 'preformed vitamin D3']
例句：
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1. Precalciferol is a form of vitamin D that is absorbed by the body more quickly than other forms.
前钙素是一种维生素D的形式，它被身体吸收的速度比其他形式更快。
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2. The plant produces precalciferol, which is used to treat bone and joint problems.
这种植物产生前钙素，用于治疗骨和关节问题。
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3. Precalciferol supplements are often recommended for people who have difficulty absorbing certain vitamins.
对于难以吸收某些维生素的人来说，通常推荐使用前钙素补充剂。