求翻译：John, a farmer, was riding his cart along the country road. He had to arrive at the market early so that he could sell his vegetables. It rained heavily the day before，so it was very difficult for the horse to move on in the mud. Then suddenly the wheels of the horse cart sank deep into the mud.是什么意思？

待解决 悬赏分：1 - 离问题结束还有