Now when you're talking about trying to travel long distances on rough terrain, I immediately thought of a mountain bike, and a mountain bike's good at doing this because it has a gear train, and you can shift to a low gear if you have to climb a hill or go through mud or sand and you get a lot of torque but a low speed.
当你们谈到在崎岖的路上 长距离行进时 我立刻想到了山地自行车 山地自行车很擅长做这件事 因为它有变速器 你可以调到低档来爬坡 或者穿越泥浆和沙地 力矩变长，但是速度很慢