All the other historians suffer from being somewhat dazzled, and in this dazzled state they fumble about.

其他的历史家都有些眼花神迷，也就不免在眩惑中摸索。

In March he goes on a survival course and learns about the "mumbles": as hypothermia sets in you mumble, fumble, grumble, stumble, then finally tumble.

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。