知识扩展
短语动词
短语动词 ratchet down （使）有一定减少（或降低） ratchet up （使）有一定上升（或提高） 查看更多 以下资源来自牛津词典 ratchet (sth)↔up （使）逐渐小幅增长 to increase, or make sth increase, repeatedly and by small amounts Overuse of credit cards has ratcheted up consumer debt to unacceptable levels. 滥用信用卡使消费债务逐渐增加到了难以接受的地步。 收起
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