by the numbers
按部就班
口语·形容机械或按部就班
英文释义
to do something in a predictable and methodical way, without any creativity or originality
例句
He painted the room by the numbers, following the instructions exactly.
典故来源
源自绘画或军事训练，指按编号步骤操作，缺乏创意或灵活性。