英语词汇appleton layer的起源、历史背景-英语词源词典

词汇	appleton layer
词源	Appleton layer. English physicist Edward Appleton (1892– 1965) discovered this upper region in the ionosphere that is 150 miles from Earth and part of the earlier discovered heavi- side layer. Appleton named the region after himself and was knighted for his discovery in 1941. Sir Edward won the Nobel Prize in physics in 1947.
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英语词源词典收录了13259条英语词源词条，基本涵盖了全部常用英语词汇的起源、历史，是研究英语词汇或通过词源学英语的必备工具。