cod-liver oil

基本解释

Fish processing factories: transfer of cod-liver oil, fish oil, dried fish floss and pomade;
鱼类加工厂的鱼肝油、鱼油、鱼松、鱼渣的输送；
www.chaolong.com.cn
But neither is whale tempting: chewing its skin is like gnawing a strip of leather soaked in cod-liver oil.
但是鲸鱼也不吸引人，它的皮咀嚼起来就像浸泡在鱼肝油里的皮带。
All these explanations are plausible, but I think there’s also something else responsible for our continuing to feed children this latter-day cod-liver oil.
这些解释看起来都有道理，但是，我认为还有某些其他原因，使我们不断地喂给孩子这种“现代鱼肝油”。
blog.sina.com.cn

Raw whale-meat bacon (a.k.a. blubber) was white, hard to swallow and tasted like pork fat injected with cod-liver oil.
FORBES: Magazine Article

Cod liver oil is a thick, yellow oil which is given as a medicine, especially to children, because it is full of vitamins A and D.