This gadget you see right here was called the digital wall mapper, and it produced the first three-dimensional map anybody has ever done of a cave, and it happened to be underwater in Wakulla Springs.
你们在这里见到的这个是电子墙体测绘仪-- 它制出了世界上第一个山洞的三维地图， 那是在瓦库拉泉水下