| 单词 | x-rays |
| 释义 | x-rays [`eks´rāz] PHYSICS A penetrating electromagnetic radiation, usually generated by accelerating electrons to high velocity and suddenly stopping them by collision with a solid body, or by inner-shell transitions of atoms with atomic number greater than 10; their wavelengths range from about 10-5 angstrom to 103 angstroms, the average wavelength used in research being about 1 angstrom. Also known as roentgen rays; x- radiation. |
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