pipe down片语动词KK [paɪp daʊn] /paɪp daʊn/发音片语动词1安静下来、住嘴、别吵口语,多用于命令句Pipe down, you two, I'm trying to work in here.你们两个安静点,我在这里工作呢。2收敛、消气、冷静下来口语He piped down as soon as the manager walked in.经理一进来,他立刻就收敛了。用这个字练口说→