| 单词 | atomic number 38 |
| 释义 | atomic number 38 (extremely rare) n WORD FAMILY atomic number 38 n a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite Syn|Hypo|Hyper Sr, strontium strontium 90 a radioactive isotope of strontium (with the mass number 90) that is present in the fallout from nuclear explosions; can be assimilated like calcium into bones metal, metallic element any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc. |
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