surface_radioactivity_content_of_239Pu
https://w3id.org/hacid/data/cs/variables/cf/surface_radioactivity_content_of_239Pu <https://w3id.org/hacid/onto/data/Variable>
The surface called "surface" means the lower boundary of the atmosphere. "Content" indicates a quantity per unit area. "Radioactivity" means the number of radioactive decays of a material per second. "Pu" means the element "plutonium" and "239Pu" is the isotope "plutonium-239" with a half-life of 8.91e+06 days.
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surface_radioactivity_content_of_239Pu