10月4日，陕西省汉中市大巴山腹地的天悬天坑，探险队员利用SRT（洞穴单绳）技术上升，返回地面。[视觉中国 向航 摄]
A member of the spelunking team climbs up via SRT to get back to the ground from the cave on Oct. 4, 2016. [Photo/VCG]