His three space shuttle missions include piloting the Discovery flight of August 1985 to deploy three communications satellites and to capture and repair another. He was selected as an astronaut in 1978 and left NASA in 1994.
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。