| 单词 | background radiation |
| 释义 | Cultural definitions for background radiationbackground radiation Low-level radiation at the surface of the Earth that comes from cosmic rays and from small amounts of radioactive materials in rocks and the atmosphere. The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved. background radiation[ băk′ground′ ] n.Relatively constant low-level radiation from environmental sources such as building materials, cosmic rays, and ingested radionucleides in the body. Words nearby background radiationbackgrounder, background extinction, background music, background processing, background projection, background radiation, back hack, backhand, backhanded, backhander, backhaul The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. |
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