| 单词 | coronium |
| 释义 | coroniumcoronium(kəˈrəʊnɪəm)CoroniumCoroniuma hypothetical chemical element to which the formation of emission lines in the spectrum of the sun’s corona was ascribed. In 1939–40 it was established that the observed coronal lines are actually caused by a number of electron transitions in highly ionized elements, namely, iron, nickel, calcium, and argon. |
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