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centre of impact |
撞 心: 17 phrases in 12 subjects |
Architecture | 1 |
Athletics | 1 |
Automobiles | 1 |
Bridge construction | 1 |
Chemistry | 1 |
Electronics | 1 |
Explosives and Explosive Ordnance Disposal | 1 |
General | 2 |
Geophysics | 1 |
Navigation | 1 |
Space | 2 |
Technology | 4 |