from the bottom up starting at the lower end or beginning of a hierarchy or process and proceeding to the top 从最底层做起; 从头学起： we began to study history from the bottom up. 我们从头学历史。 from the bottom up彻底地;从一开始：They abolished all irrational rules and regulations from the bottom up.他们彻底地废除了一切不合理的规章制度。 |