Cadmium is one of the most toxic heavy metals and is not an essential nutrient element for plant, animal and human being.

镉是动物和植物的非必需元素，也是毒性最大的重金属之一。

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Phosphorus is an essential nutrient for human being and living things growing.

磷在人及生物生长发育过程中具有重要作用。

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Zinc is an essential nutrient element for biological organisms, but it is toxic to plant, animal and human at excess levels.

锌是生物必需微量元素，但过多时对动植物都有毒害。

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These bees prefer sweaty people over most animals because the human diet usually is so salty that their perspiration is saturated with the essential nutrient, experts said.

WSJ: New Sweat Bee Generates Buzz