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spectrum variable
释义
spectrum variable
spectrum variable
[
′spek·trəm ′ver·ē·ə·bəl
]
(astronomy)
A main-sequence star of spectral class A whose spectrum displays anomalously strong lines of metals and rare earths whose intensity varies by about 0.1 magnitude over periods from 1 to 25 days.
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nitrogen fixation
nitrogen-fixation
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nitrogen fixation in tropical agricultural legumes
nitrogen fixation process
nitrogen fixation stimulation
nitrogen fixer
nitrogen-fixer
nitrogen fixing
nitrogen-fixing
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nitrogen-fixing bacteria
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nitrogen fluorine compounds
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nitrogen gas
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nitrogen group
nitrogen group element
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更新时间:2025/3/17 5:45:47