英语词汇“penumbral theory”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	penumbral theory
释义	penumbral theory 半影说
随便看	electron feedback electron field Electron field activation electron field emission electron file electron flare electron flood beam display tube electron-flood-beam display tube electron flow electron flow direction electron fluid electron flux electron flux density electron flux density indicator electron flux density meter electron focus electron focusing electron foil electronfractography electron fractography electron frame electron frequency drift electron furnace iron electron gain Electron gain