云雾径迹 yún wù jìng jì

DEFINITIONS

  1. cloud track (trace of ionizing particle in cloud chamber)

CHARACTERS

云 yún
HSK 4
say, speak; clouds
雾 wù
HSK 5
fog, mist, vapor, fine spray
径 jìng
HSK 6
narrow path; diameter; direct
迹 jì
HSK 5
traces, impressions, footprints