Cave exploration, or potholing, as it has come to be known, is a relatively new sport.
洞穴勘察－或者洞穴勘探（人们已经熟悉了这个词语）－是一项较新的运动。
The Elizabethan age was a time of exploration and discovery.
英国女王伊丽莎白一世时代是探索和发现的时代.
It is true during their explorations they often faced difficulties and dangers of the most perilous nature.
确实在探险中，他们经常面临着各种最有危险性的艰难和险阻。
