start from scratch
从零开始，重新开始
口语·描述全新开始
英文释义
to begin from the beginning; to start over completely; to build something from the ground up
例句
After the fire destroyed the bakery, they had to start from scratch with nothing but a recipe book.
典故来源
源自体育或赛跑中'scratch'指起跑线，从零开始意味着没有优势或基础。