The movable flaps on the back edges of the space shuttle. Each delta wing has two elevons that are used to control the vehicle's pitch and roll as it settles into denser air on re-entry.
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。