1. The answer to this question is now under exploration.
    该问题的解决办法在探讨中。

2. Then on February 7,1800, they left the coast and turned south. Their exploration began.
    1800年2月7日，他们离开了海岸，转向南方，开始了他们的探险。

3. 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。

4. Cave exploration, or pot-holing, as it has come to be known, is a relatively new sport.
    洞穴勘查--或洞穴勘探--是一项比较新的体育活动。