The main reason is that the updraft over the icerain area is weak, and the vapor in the air is not saturated.
这主要是因为冻雨区的上升气流弱，高空水汽不饱和。
2
It's possible that rain on the desert floor could turn to thin sheets of ice when temperatures drop at night.
当夜间气温下降时，沙漠地面上的雨水有可能变成薄冰。
3
After lying for hours on cold ground, with only a thin sleeping bag to protect you from rain or ice, your fingers would probably be so numb that you could hardly move them.