In july he takes a dip in an arctic swimming hole . In october he studies animal hibernation . In march he goes on a survival course and learns about the " umbles " : as hypothermia sets in you mumble , fumble , grumble , stumble , then finally tumble .

七月，他跳入北冰洋游泳洞；十月，研究动物冬眠；三月，开始野外生存训练，懂得了寒冷下嘴、脚是什么样：低温开始了，咕哝，摸爬，嘟囔，踉跄，终于仆倒在地。