The only naturally rich dietary sources are oily fish from the sea like salmon and mackerel, egg yolks, liver and fish liver oil.

富含天然维生素d的食品只有含油较多的鱼，例如三文鱼和鲭鱼、蛋黄、动物肝脏和鱼肝油。

youdao

The contents of lipid and neutral lipid in the fish liver increased with the increase of dietary lipid level, but were not significantly different from each other in the appropriate lipid level.

肝脏脂质含量和中性脂质含量随着饲料脂肪添加量的增加而升高，但在饲料脂肪适宜含量范围内各组间却无显著差异。

youdao

Squalene is commercially extracted from fish oil, and in particular shark liver oil. Squalene used in pharmaceutical products and vaccines is purified from this source.

市售角鲨烯提取自鱼油—尤其是鲨鱼肝油，提纯后可用于药物制品和疫苗。

youdao

Vitamin A is found in fish liver oil.

VOA: special.2009.04.21

Fish liver oil also contains vitamin D.

VOA: special.2009.04.21

Small amounts of vitamin D can be consumed through food, such as fish, cod liver oil, and fortified milk and juice.

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Vitamin D is commonly found in fish, eggs, fortified milk, cod liver oil and in supplements.

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He turned back and said something to the two men who were on the other side of the fish, hacking away at the connective tissue around its liver.

NEWYORKER: Swimming