A rescue plane was sent to search for the missing aircraft, and it, too, disappeared without trace trace 1)人或动物留下的痕迹,比如足迹 e.g. Age has left its traces on her face 岁月在她脸上留下了痕迹 2) To follow the course or trail of.跟踪,跟随…的道路或 足迹 e.g. trace a wounded deer, tracing missing persons 跟踪一头受伤的鹿;追寻失踪者2. A rescue plane was sent to search for the missing aircraft, and it, too, disappeared without trace.  trace: 1) 人或动物留下的痕迹，比如足迹 e.g. Age has left its traces on her face. 岁月在她脸上留下了痕迹。 2) To follow the course or trail of. 跟踪, 跟随…的道路或 足迹. e.g. trace a wounded deer; tracing missing persons. 跟踪一头受伤的鹿；追寻失踪者