英汉例句雙語例句Looking skyward along the Milky Way's arc from the left are Alpha and Beta Centauri, the Coalsack, the Southern Cross, and the Carina Nebula.朝天空看，循著銀河的亮弧，從左邊半人馬α和β（南門二與馬腹一），至煤袋星雲，南十字，船底星雲。coalsack nebula更多例句词组短语短語Coalsack Dark Nebula 英語coalsack nebula更多词组