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元古界 yuángǔjiè
earth.sc. Proterozoic
oil Proterozoic group
tech. Agnotozoic erathem; Proterozoic erathem
元古界〔代〕 yuángǔjiè
gen. Algonkian (的)
元古界【代】 yuángǔjiè
geol. Proterozoic
元古界 yuángǔjiè
eng.geol. Proterozoic
元古界 yuángǔjiè
geol. Proterozoic
元 古界
: 4 phrases in 2 subjects
Latin2
Oil / petroleum2