verb · to take into custody or retain a suspect or offender during an investigation

监察机关依法对涉嫌违法的官员采取了留置措施。

verb · (medicine) remaining inside a body part or organ for a period of time, such as a catheter

护士为患者插入了留置导尿管并定期检查。

verb · to leave in place or set aside for further use

这些多余的材料被留置在工地上以备后用。