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a concave mirror中文是什么意思

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用"a concave mirror"造句"a concave mirror"怎么读"a concave mirror" in a sentence

中文翻译手机手机版

  • 凹面的

例句与用法

  • The diameter of a sphere is four times the focal length of a concave mirror cut from it
    凹面镜如果是从圆球上切下来的,圆球的直径会是凹面镜焦距的四倍。
  • From gillens hairdressers window a composite portrait shows him gallant nelson s image . a concave mirror at the side presents to him lovelorn longlost lugubru booloohoom
    隔着吉伦理发店的窗户可以瞥见一帧综合照片16 ,映出纳尔逊的潇洒英姿。
  • Renaissance craftsmen , moreover , would have faced severe technical challenges in silvering and sealing a concave mirror , which required the application of hot tar and pitch on the outside of the glass
    文艺复兴时代的工匠在涂银与装置凹面镜时,还要面对更多艰难的技术挑战,那需要在玻璃表面施予滚烫的焦油与沥青。
  • For a number of historical and technical reasons , hockney envisions a camera obscura based not on a lens but on a concave mirror ( curved inward like a shaving or makeup mirror ) , which can also project an image onto a screen
    由于历史与技术上的若干理由,霍克尼推想出一种不采用透镜、却利用凹面镜的暗箱(凹面镜是一种内凹的镜子,比如刮胡子或化妆时用的镜子) ,这种镜子也可以把影像投射到屏幕上。
  • A concave mirror reflects parallel light rays so that they meet at the so - called focal point . ( if you try to use such a mirror to start a fire in sunlight , you place the tinder at the focal point . ) the distance from the mirror to the focal point is its focal length
    凹面镜反射平行光,让光线汇聚到所谓的焦点(如果你想用这种镜子在日光下起火,就要把易燃物放在焦点上) ,从镜面到焦点的距离就是焦距。
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