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作的功 |
done work : 42 phrases in 12 subjects |
Bridge construction | 3 |
Business | 3 |
China | 1 |
Construction | 2 |
Economy | 2 |
Explosives and Explosive Ordnance Disposal | 1 |
General | 2 |
Management | 1 |
Metallurgy | 1 |
Nautical | 1 |
Technology | 24 |
United Nations | 1 |