to the last

详细解释:到底, 至终

例句：

He had been puzzling all day for the answer to the last clue in the crossword and was about to tear his hair out when his wife told him the correct answer.他整整一天都在为能解答纵横填字的最后一个迷而苦思，就在他几乎已是集躁不安的时候，他妻子告诉他正确的答案。