take a back seat
退居次要地位，不再参与或占主导地位
口语·表达退居次要
英文释义
to assume a secondary or subordinate role; to allow someone else to take control or have prominence
例句
After the promotion, he decided to take a back seat and let his team lead.
典故来源
源自车辆座位安排，后座位置不如前座显要，比喻退居次要或被动角色。