| 单词 | radioisotope |
| 释义 | radioisotope (once / 140707 pages) n WORD FAMILY radioisotope: radioisotopes USAGE EXAMPLESThis radioisotope is produced when energetic space particles raining down from the sky hit the oxygen and silicon atoms in quartz minerals. BBC(May 27, 2016) For all its audacity, Lawrence’s conjecture about the potential to create new radioisotopes was correct. Michael Hiltzik, Big Science(2015) This cement will need to block the passage of radioisotopes far into the future. BBC(Feb 13, 2016) n a radioactive isotope of an element; produced either naturally or artificially Hypo|Hyper tracer (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes labela radioactive isotope that is used in a compound in order to trace the mechanism of a chemical reaction iodine-131heavy radioactive isotope of iodine with a half-life of 8 days; used in a sodium salt to diagnose thyroid disease and to treat goiter iodine-125light radioactive isotope of iodine with a half-life of 60 days; used as a tracer in thyroid studies and as a treatment for hyperthyroidism isotope one of two or more atoms with the same atomic number but with different numbers of neutrons |
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