all along
一直以来；一直都知道
口语·表示一直知道或存在
英文释义
from the beginning; throughout the entire duration of something; at every stage or moment
例句
I knew all along that she was the one who took the cookie.
典故来源
源自中古英语“along”表示“持续”，强调从开始到现在的整个过程。