英语词汇“technetium stars”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	technetium stars
释义	technetium stars technetium stars (tek-nee -shee-ŭm) A class of asymptotic giants (usually S stars or carbon stars) that show absorption lines of technetium in their spectra. Because technetium (⁹⁹Tc) is an unstable radioactive element decaying with a half-life of 2.1 × 10⁵ years, it must have been produced in the burning shell of the star in which it is observed. See also radioactive decay.
随便看	interagency support inter-agency support office inter-agency support unit interagency sustainability working group inter-agency task force inter-agency task force on disaster reduction inter-agency task force on forests inter-agency task team inter-agency terminology exchange interagency tracking and communications operations panel inter-agency transfer inter-agency transportation coordination committee interagency wetlands policy act of 1989 interagency wild and scenic rivers coordinating council inter-agency working committee inter-agency working group interagency working group interagency working group on data management for global change interagency working group on drug enforcement communications interagency working group on nanoscience, engineering and technology interagency working group on ocean observations interagency working group on sustainable development indicators inter-agency working party interagency work order inter agency yacht race

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