| 单词 | proton beam |
| 释义 | proton /prōˈton/ (physics)nounAn elementary particle of positive charge and unit atomic mass, the atom of the lightest isotope of hydrogen without its electron ORIGIN: Gr, neuter of prōtos first protonic /prō-tonˈik/ adjective proton beam noun A beam of protons produced by a proton accelerator proton pump inhibitor noun Any of several short-term treatments for gastric and duodenal ulcers and for the eradication of the bacterium helicobacter pylori (abbrev PPI) proton synchrotron see accelerator under accelerate |
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