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pierre janssen造句

"pierre janssen"是什么意思   

例句與造句

  1. If you have knowledge in simple image processing , you may reduce the noise further by taking many exposure on the same object , and stack them together in computer . after gaining some experience , you many want to take close - up photos of clusters and nebula . since the magnifying and light collecting power of the camera lens is not enough , you have to connect the camera to a telescope
    在1868年,法國天文學(xué)家pierre janssen發(fā)現(xiàn)了在太陽的光譜中,有一條奇怪的光譜線,起初科學(xué)家以為這是一種地球上并不存在的物質(zhì)所造成的,所以把這種新物質(zhì)命名為氦英文為helium ,這個字來自希臘語的helio ,意思即為太陽。
  2. It's difficult to find pierre janssen in a sentence. 用pierre janssen造句挺難的

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