例句
We’d normally get minerals such as selenium and copper from plants.
我们通常从植物中获取矿物质比如硒和铜。
It contains a lot of tryptophan, manganese, iron, protein and selenium.
它含有很多色氨酸，锰，铁，蛋白质和硒等元素。
Small amounts of selenium are essential for health and help build a strong immune system to fight off infections and diseases.
少量的硒元素对人体健康是必要的，能帮着建立一个抵抗传染病和疾病的免疫系统。