追踪调查 zhuī zōng diào chá

DEFINITIONS

  1. follow-up study
  2. investigative follow-up

CHARACTERS

追 zhuī
HSK 5
pursue, chase after; expel
踪 zōng
HSK 6
footprints, traces, tracks
调 diào
HSK 3
transfer, move, change; tune
查 chá
HSK 3
investigate, examine, seek into