ray

• Strictly speaking, it is not possible to absorb gamma rays completely .
  严格来说，不可能把射线全部吸收掉。
• Cosmic rays and x-rays produce energetic electrons by ionization .
  宇宙射线和X射线因其电离作用产生高能电子。
• The cathode rays are always beamed on a fresh area of the anode surface .
  阴极射线总是射向阳极表面的新区域。
• In november ray himself escaped from cuba and made his way to miami .
  十一月，拉伊本人逃出古巴，来到了迈阿密。
• There is gloom above and darkness below , with the rays of the sun and the moon completely shut out .
  日月无光。
• Any outgoing ray path must be coincident with that of the returning ray .
  任何出发的射线与返回的射线路径完全相同。
• A ray is a line beginning at a certain point and extending indefinitely .
  射线是一根从某一点开始，无限止地延伸的线。