HR diagram
(Islam) Any of thirty parts of varying length into which the Qur'an is sometimes divided.
plural of common snipe
plural of mechanizer
(astronomy) Abbreviation of Hertzsprung-Russell diagram.
天体物理学の授業では、近くの恒星の光度と表面温度を比較するためにヘルツシュプルング・ラッセル図を使用した。
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