For precisely 200 years , in the longest unbroken string of national nose-counting in the world , they have climbed , hiked , swum , snowshoed , ridden mules and flown in helicopters to keep track of us .

整整二百年来，在世界上历时最长的、从未间断的一系列全国性的人口普查中，他们曾爬山、步行、游泳、穿雪鞋、骑马骡，一直到乘直升飞机，到处追踪着我们。