The main takeaway of this study, especially for science nerds, is that copper ultimately can be classified as a signaling element.

这项研究的主要结论是，铜最终可以被归为一种信号元素。

It's long believed that the only signaling elements in the body were that of electrolytes, such as sodium, calcium, and potassium.

长期以来，人们一直认为，体内唯一的信号元素是电解质，如钠、钙和钾。