A NASA patch, or badge, for a particular space mission, worn on a crew member's flight suit above the heart. The Apollo 11 patch, for example, showed an eagle landing on the Moon with a half Earth in the black background.
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。