这些链状或环状的碳原子被氢原子包围。
These are chains or rings of carbons atoms surrounded by hydrogen atoms.
图4显示了一个酷似环状的图表。
脑和脊髓都受骨骼保护:脑由颅骨保护,而脊髓则由脊柱保护(一组环状的椎骨共同构成了脊柱)。
Both the brain and the spinal cord are protected by bone: the brain by the bones of the skull, and the spinal cord by the set of ring-shaped bones called vertebrae that make up the spine.
There is no way that you could irradiate a crystal of nickel with a single beam of x-rays and get that circular ring pattern if the electron beam were behaving as a particle beam only.
没有什么其他的途径,可以让镍晶体发射,单束X光来,继而得到环状图案,如果电子束,是以粒子束形式出现的。
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