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实地研究
gen. understudy
adv. field research
agric. on-farm research
agric., econ. area familiarization; field study
实地现场研究
anim.husb. field research
实地 研究: 19 phrases in 9 subjects
Aviation2
Earth sciences8
Electronics1
Explosives and Explosive Ordnance Disposal2
Geology1
Geophysics1
Oil / petroleum1
Space2
Technology1