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前寒武纪 qián hánwǔjì
agric. Precambrian (period)
bridg.constr. Precambrian period
desert. Pre-Cambrian; Pre-Cambrian Period
oil Precambrian; Eozoic
前寒武纪【地】 qián hánwǔjì
tech. Pre-Cambrian era; Pre-Cambrian period
前寒武纪 qián hánwǔjì
gen. Precambrian
前寒武纪 qián hánwǔjì
geol. Precambrian period (system)
前寒武纪: 20 phrases in 8 subjects
Desert science1
Earth sciences6
Engineering geology1
General1
Genetics2
Geology2
Oil / petroleum2
Technology5