云雾径迹

cloud track (trace of ionizing particle in cloud chamber)

(classical) to say

surname Yun / abbr. for Yunnan Province 雲南省|云南省[Yun2 nan2 Sheng3]

cloud / CL:朵[duo3]

clouds and mist

fog / mist / CL:場|场[chang2],陣|阵[zhen4]

footpath / track / diameter / straight / directly

track / trajectory / path / way / means / diameter / directly

footprint / mark / trace / vestige / sign / indication / Taiwan pr. [ji1]

variant of 跡|迹[ji4]

variant of 跡|迹[ji4]