alpha and omega
始終;核心;重要部分
书面/口语·强调事物的根本或全部
英文释义
the beginning and the end; the most important or essential part; the entirety or completion of something
例句
Trust is the alpha and omega of any relationship.
典故来源
源自《圣经·启示录》中上帝自称“阿拉法、俄梅戛”（希腊字母首尾），象征永恒与核心。