The capsule was part of the Mercuryprogram, and Glenn's space flight took four hours and 55 minutes.
太空舱是水星计划的一部分，格伦的太空飞行了4小时55分钟。
2
S. between 1964 and 1967, following the one-person Mercuryprogram and before the three-person Apollo program.
在它之前的是「水星号」单人宇宙飞船系列，在它之后则是可载三人的阿波罗计划。
3
Fifty years ago when Alan Shepard climbed inside his Mercury capsule to blast off into space, things were looking pretty grim for the fledgling U.S. space program.