追蹤調查 zhuī zōng diào chá

DEFINITIONS

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

CHARACTERS

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