Read Edit View history 发射星云 fāshèxīngyún emission nebula Origin Definitions Defs Strokes Stroke Words Sentences Sents created sense approved 发射星云/發射星雲 · fāshèxīngyún · emission nebula 2026/03/04 发射星云 / 發射星雲 fāshèxīngyún emission nebula emission nebula 猎户座大星云是一个著名的发射星云。 created sense Mar 4, 2026, 02:25 AM