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evidence | |||
historical material | |||
historical sources | |||
historical data; historical materials |
史料: 25 phrases in 12 subjects |
Agriculture | 1 |
Business | 1 |
China | 4 |
Earth sciences | 1 |
Ecology | 1 |
Economy | 2 |
Electronics | 1 |
General | 2 |
Hydroelectric power stations | 1 |
Librarianship | 5 |
Oil / petroleum | 1 |
Technology | 5 |