Initialism for do not resuscitate, a medical order declining CPR

• Directive to withhold resuscitation if breathing or heartbeat stops

“不予复苏”的缩写：指示停止心肺复苏等抢救措施

• 患者或医生出具的不实施复苏的医疗指令

Initialism for digital noise reduction, a method reducing signal noise

• Technology that suppresses hiss or grain in audio or video

“数字降噪”的缩写：用于降低音频或视频噪声的技术

• 通过信号处理抑制噪声的算法

Initialism for do not rent, a renter blacklist

• Label marking individuals barred from renting by a provider

“禁止出租”的缩写：指不向某人出租的黑名单

• 用于标记被房东或平台拒租的人员