乌贼墨中有毒微量元素铅、镉和砷的浓度分别比鱿鱼墨高121%、127%和319%，但汞的含量相近。

Toxic element, Pb, Cd and as, were higher in sepia than in squid ink by 121%, 127% and 319%, while Hg was similar.

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镉是重金属有毒元素，其环境污染一直是众多学者研究的焦点。

The environmental pollution caused by cadmium, a heavy metal toxic element, has aroused geologists' attention.

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