A cross-shape in the southern sky formed by four stars, Iota and Epsilon Carinae and Kappa and Delta Velorum, sometimes mistaken for the true Southern Cross (the constellation Crux).
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。