| 单词 | rare gas |
| 释义 | rare gasrare gasrare gasrare gasrare gas:see inert gasinert gasor noble gas, any of the elements in Group 18 of the periodic table. In order of increasing atomic number they are: helium, neon, argon, krypton, xenon, and radon. They are colorless, odorless, tasteless gases and were once believed to be entirely inert, i.e. ..... Click the link for more information. . rare gas[′rer ′gas] |
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