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单词
space density
释义
space density
noun
Astronomy
the frequency of occurrence of stars, particles, or other heavenly bodies, per specified volume of space
【天文】空间密度。
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pennant
pennate
penne
penned, penning
penni
pennies
pennies from heaven
penniless
pennilessness
pennillion
Pennine Hills
pennon
pennoned
penn'orth
Pennsylvania
Pennsylvania Dutch
Pennsylvanian
-penny
penny
penny ante
penny arcade
penny black
penny bun
pennycress
penny dreadful
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更新时间:2026/7/17 9:51:33