她的自行车撞上树后，前后轮失去了均衡。

The wheels of her bicycle were out of kilter after it hit the tree.

youdao

只要你能停下来，你就不会撞上树、撞上石头、撞上人，你就不会被撞死。

And when you are able to stop, you will not hit a tree or a rock or someone else, you won't end up crashing dead.

youdao

但这样的处理对乔安娜来说显然有点困难，因为除了自己感到懊悔外，她总是为我感到恐惧和担忧，希望我不要开车撞上树或发生别的什么事。

This of course made things even harder for JoAnn, because in addition to her own woes she would feel frightened and concerned for me - hoping I wouldn't drive the car into a tree or whatever.

youdao