焦距的英文：
focus

參考例句：
  • Having three focal lengths.
    三焦距的有三個(gè)焦距的
  • Focus-to-film distance(f.f.d)
    焦點(diǎn)-膠片距離(焦距)
  • This is a long focus lens.
    這是個(gè)長(zhǎng)焦距鏡頭。
  • Adjust the focus of a camera
    調(diào)整照相機(jī)的焦距
  • The image got out of focus
    這影像沒(méi)有對(duì)準(zhǔn)焦距。
  • focusing glass [ screen ]
    【攝】調(diào)焦距用的毛玻璃
  • Short focal length (high aperture) lens
    短焦距(大孔徑)透鏡
  • The image goes out of focus.
    這影像未對(duì)準(zhǔn)焦距。
  • Eyeglasses having trifocal lenses.
    有三焦距鏡片的眼鏡
  • The focal length differs with the thickness of the lens
    焦距長(zhǎng)底隨透鏡的厚度而變化。
focus是什么意思：
v. （使）集中；（使）聚焦；調(diào)節(jié)焦距
n. 焦點(diǎn)；焦距；中心
  • The image is in focus.
    這影像在焦點(diǎn)上。
  • Focus your attention on your work.
    把注意力集中在你的工作上。
  • The research focus of uncommitted robbery has two.
    搶劫未遂的研究焦點(diǎn)有二。
  • The role of this part is to educe the focus of this article.
    這一部分的作用是引出本文的重點(diǎn)。
  • "then focus on the colour of the image, "
    接著讓他們關(guān)注圖像的顏色

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