That's 'cause they're so shriveled up, they can't even see over the steering wheel.

他们是因为人老太萎缩，缩到开车时都看不见前面了。

Uncle Vernon's rations turned out to be a packet of crisps each and four bananas. He tried to start a fire but the empty crisp packets just smoked and shriveled up.

弗农姨父弄来吃的东西也只是每人一包薯片和四根香蕉。他想把火生起来，但薯片的空包装袋只冒了一股烟，之后就卷缩成一堆灰烬了。