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单词
nuclear time scale
释义
nuclear time scale
nuclear time scale
[
′nü·klē·ər ′tīm ‚skāl
]
(astronomy)
The time it takes for a star to evolve a significant distance from the main sequence when a certain fraction of the hydrogen in its core has been converted to helium by thermonuclear reactions.
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更新时间:2025/7/30 5:43:58