ＮＡＳＡ计划在１９９４年执行如下８次航天飞机飞行任务：１．２月３日，发现号航天飞机载着６名航天员升空。这是第６０次航天飞机飞行。２．３月３日，哥伦比亚航天飞机带５名机组人员升空，执行１．４天的材料科学和技术验证实验（这次飞行已在３月４日～１８日进行）。３ NASA plans to conduct as many as eight space shuttle missions in 1994: 1. On February 3, the space shuttle Discovery was carrying six astronauts. This is the 60th shuttle flight. 2. On March 3, five crew members of the Columbia Space Shuttle took off to perform a 1.4-day material science and technology verification experiment (this flight took place from March 4 to March 18). 3