This is because carrots don't contain Vitamin A but a carotenoid called beta carotene which is a “provitamin” — a substance that can be converted into a vitamin.
因为胡萝卜所含的并不是维生素 A，而是一种叫做β-胡萝卜素的类胡萝卜素，它是一种“维生素原”，一种可以转化成维生素的物质。
| 单词 | provitamin A |
| 释义 |
provitamin A
英汉-汉英词典
维生素A原
词组 | 习惯用语
您要查找的是不是：previtamin A 前维生素A英语; 翻译; neovitamin A 新维生素A provitamin a 维生素A原; 胡萝卜素; 前维生素A英语; 维生素A原英语; provitamin a carotenoid 维生素A原类胡萝卜素 provitamin a carotenoids 前维生素A类胡萝卜素 provitamin A 维生素A原
原声例句
WIL生活启示录 This is because carrots don't contain Vitamin A but a carotenoid called beta carotene which is a “provitamin” — a substance that can be converted into a vitamin. 因为胡萝卜所含的并不是维生素 A，而是一种叫做β-胡萝卜素的类胡萝卜素，它是一种“维生素原”，一种可以转化成维生素的物质。
英语百科
beta-Caroteneβ-Carotene is an organic, strongly colored red-orange pigment abundant in plants and fruits. It is a member of the carotenes, which are terpenoids (isoprenoids), synthesized biochemically from eight isoprene units and thus having 40 carbons. Among the carotenes, β-carotene is distinguished by having beta-rings at both ends of the molecule. β-Carotene is biosynthesized from geranylgeranyl pyrophosphate.
近义、反义、联想词
近义词n.provitamin
英英词典
provitamin a n.
synonymous： carotene, carotin |
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