Kirkwood gap
(astronomy) A gap in the distribution of semi-major axes of asteroids in the main belt.
plural of Christmas present
plural of chess set
(geology) The formation of argillic clay from feldspars
天文学者たちは、木星との共鳴が主小惑星帯に見られるカークウッド・ギャップをどのように作り出すかを研究した。
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