Phosphorus was the nutrient element limiting the eutrophication of the lake. 磷是湖泊富營養化的限制性營養元素。
Selenium is not only a kind of essential nutrient element for human being and animals, but it is also indispensable in plant growth. 摘要微量元素硒不僅是人和動物必需的營養元素,也是植物生長發育不可缺乏的元素。