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	germ line germ-line germline germ line cell germ line cells germ-line gene therapy germline mutation germ lines germline specific rna binding protein germline stem cell germ line transmission germ membrane germ nucleus germny germogen genus tomistoma genus toona genus torreya genus tortrix genus townsendia genus toxicodendron genus toxostoma genus toxotes genus trachelospermum genus trachinotus

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