Iron is an essential nutrient with crucial biological function.

铁是人体必需的微量元素，有着重要的生物学功能。

youdao

And nitrogen is one of those and in fact it's an essential nutrient.

氮就是这些物质之一，事实上它是一种主要的营养物质。

youdao

Iodine is an essential nutrient for growth and normal development of the brain.

碘是一种对于生长和大脑的正常发育必需的营养素。

youdao

Iodine is an essential nutrient for growth and normal development of the brain.

碘是一种对于生长和大脑的正常发育必需的营养素。

youdao