De Forest

英 美
  • 德福雷斯特(①姓氏②Lee,1873-1961,美国发明家)
  • de abbr.特拉华州(=Delaware)n.判定元件(去加重)
  • forest n.森林;林火vt.(用树林)覆盖;置于(树林中)
Noun:
  1. United States electrical engineer who in 1907 patented the first triode vacuum tube, which made it possible to detect and amplify radio waves (1873-1961)