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纪元 jìyuán
gen. epoch
desert. Anno Domini
econ. Anno Domini (in the year of Lord;since the birth of Christ)
el. aeon
hydroel.st. era
oil common era
纪元 jìyuán
gen. epoch
纪元: 33 phrases in 14 subjects
Aviation1
Business1
China2
Desert science3
Earth sciences2
Electronics1
Finances1
General7
Geology1
Metallurgy1
Securities2
Space2
Technology8
Telecommunications1