关于这张图
JSC2008-E-118400 (26 Sept. 2008) --- Astronaut John Grunsfeld (right), STS-125 mission specialist, and Tomas Gonzalez-Torres, STS-125 lead spacewalk officer, discuss training activities in the Neutral Buoyancy Laboratory (NBL) at the Sonny Carter Training Facility near NASA's Johnson Space Center.
