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。
Dietary protein: an essential nutrient for bone health.
日粮蛋白质：一个重要营养素骨骼健康。
The Chinese birthday peach was an excellent fruit breed which had high nutrient value.
中华寿桃是一种优良的果品资源，具有较高的营养价值。
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。
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。
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。
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