負焦距 的英文怎麼說

中文拼音 [jiāo]
負焦距 英文
retrofocus
  • : Ⅰ名詞1 (負擔) burden; load 2 (虧損) loss 3 (失敗) defeat Ⅱ動詞1 [書面語] (背) carry on th...
  • : Ⅰ形容詞1 (物體受熱失去水分 呈現黃黑色並發硬、發脆) burnt; scorched; charred 2 (著急) worried;...
  • : Ⅰ名詞1 (距離) distance 2 (雄雞、雉等的腿的後面突出像腳趾的部分) spur (of a cock etc )Ⅱ動詞...
  • 焦距 : [光學] focal distance; focal length
  1. Abstract : it is proved that a small circular aperture has the positive and minus focal distances, and the research experiments for small aperture glasses are introduced concisely

    文摘:提出了證明小圓孔具有正、負焦距的一種方法,簡要地介紹了關于小孔眼鏡的實驗研究
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