行星環
释义
圍繞行星運轉的宇宙塵埃和小顆粒所形成的扁平盤狀區域
等义词
21 more languages
CEFR 等级
C2
精通
该词属于CEFR C2词汇——精通水平。
该词属于CEFR C2词汇——精通水平。
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